Communications of the Association for Information Systems
Volume 12
Article 50
December 2003
The Technology Acceptance Model: Past, Present,
and Future
Younghwa Lee
University of Colorado at Boulder, Younghwa.Lee@colorado.edu
Kenneth A. Kozar
University of Colorado at Boulder, Kozar@Spot.Colorado.edu
Kai R.T. Larsen
University of Colorado at Boulder, kai.larsen@colorado.edu
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Recommended Citation
Lee, Younghwa; Kozar, Kenneth A.; and Larsen, Kai R.T. (2003) "The Technology Acceptance Model: Past, Present, and Future,"
Communications of the Association for Information Systems: Vol. 12 , Article 50.
DOI: 10.17705/1CAIS.01250
Available at: https://aisel.aisnet.org/cais/vol12/iss1/50
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752
Communications of the Association for Information Systems (Volume 12, Article 50) 752-780
THE TECHNOLOGY ACCEPTANCE MODEL:
PAST, PRESENT, AND FUTURE
Younghwa Lee
Kenneth A. Kozar
Kai R.T. Larsen
Leeds School of Business
University of Colorado at Boulder
younghwa.lee@colorado.edu
ABSTRACT
While the technology acceptance model (TAM), introduced in 1986, continues to be the most
widely applied theoretical model in the IS field, few previous efforts examined its
accomplishments and limitations. This study traces TAM’s history, investigates its findings, and
cautiously predicts its future trajectory. One hundred and one articles published by leading IS
journals and conferences in the past eighteen years are examined and summarized. An openended survey of thirty-two leading IS researchers assisted in critically examining TAM and
specifying future directions.
Keywords: IT adoption, technology acceptance model, meta-analysis
I. INTRODUCTION
The prolific stream of research on information systems use takes a variety of theoretical
perspectives. Of all the theories, the Technology Acceptance Model (TAM) is considered the
most influential and commonly employed theory for describing an individual’s acceptance of
information systems. TAM, adapted from the Theory of Reasoned Action [Ajzen and Fishbein,
1980] and originally proposed by Davis [1986], assumes that an individual’s information systems
acceptance is determined by two major variables:
•
Perceived Usefulness (PU) and
•
Perceived Ease of Use (PEOU).
During the past eighteen years, the information systems community considered TAM a
parsimonious and powerful theory [Lucas and Spitler, 1999; Venkatesh and Davis, 2000]. Further
supporting the notion of TAM’s popularity, Venkatesh and Davis [2000] found that the first two
The Technology Acceptance Model: Past, Present, and Future by Y. Lee, K.A. Kozar, and K.R.T. Larsen
Communications of the Association for Information Systems (Volume 12, Article 50) 752-780
753
TAM articles, by Davis [1989] and Davis et al. [1989] received 424 journal citations in the Social
Science Citation Index (SSCI) by the beginning of 2000. Extending the citation search further, we
found to 698 journal citation by 2003. TAM has been applied to different technologies (e.g. word
processors, e-mail, WWW, GSS, Hospital Information Systems) under different situations (e.g.,
time and culture) with different control factors (e.g., gender, organizational type and size) and
different subjects (e.g. undergraduate students, MBAs, and knowledge workers), leading its
proponents to believe in its robustness. Currently, researchers in the IS field consider TAM one
of the information systems fields’ own theories, and still put much effort into the study of research
using the theory.
Despite its great success, however, few previous systematic efforts trace its history or investigate
and evaluate its findings, limitations, and future [e.g., Doll et al., 1998; Gefen and Straub, 2000;
Legris et al., 2003]. Evaluation is crucial for the IS community in that it helps researchers of IS
adoption understand TAM’s past research findings, identify possible research topics, and conduct
future studies. In addition, it helps educate current IS doctoral students in examining how a wellknown IS-owned theory evolved.
The present study goes back to 1986, traces the TAM research trajectory, and extensively
investigates TAM’s findings. The research purpose of the study is to answer the following five
questions:
•
•
•
•
•
How much progress did TAM make over the past eighteen years (1986-2003)?
What are the findings and discoveries of TAM research?
Who published what and where did they publish it?
What do leading IS researchers currently think about TAM research?
What are future directions for TAM research?
In all, one hundred and one articles published in information systems journals during 1986-2003
and survey results from thirty-two leading IS researchers were analyzed.
II. RESEARCH METHODS
Both a meta-analysis of previous TAM literature and a survey were conducted. Meta-analysis is a
research technique that uses statistical procedures to combine the results of independent studies
[Glass, 1981; Hwang, 1996; Mahmood et al., 2001]. This analytical method is appropriate for the
research goals of tracing the history of TAM studies and for investigating previous findings in a
systematic manner. Using this methodology, previous studies can be effectively and quantitatively
analyzed and the inconsistencies among their findings resolved [Hwang, 1996; Hwang and Wu,
1990]. In addition, meta-analysis can enhance the general validity of interpretations [Cook, 1991],
and include studies taking place over a long period of time and with a large scope [Mahmood et
al., 2001]. Meta-analysis is successfully applied in IS. [e.g., Dennis and Gallupe, 1993;
Farhoomand and Drury, 1999].
This study includes TAM research conducted from 1986 to June, 2003. An exhaustive electronic
search using Social Science Citation Index, ABI/INFORM, and Business Source Premier resulted
in 101 papers. The papers were published in IS journals such as Data Base, Decision Sciences
(DS), Information & Management, Information Systems Research (ISR), Journal of Management
Information Systems (JMIS), Management Science (MS), and MIS Quarterly, rated as leading
journals in IS and reflecting the major research stream of the IS field [Barki et al., 1993; Cheon et
al., 1993; Claver et al., 2000; Farhoomand and Drury, 1999). In addition, papers published at two
Information Systems conferences, namely the International Conference on Information Systems
(ICIS) and the Hawaii International Conference on Systems Science (HICSS), and other papers
published in interdisciplinary journals closely related to IS field were included (e.g., Decision
Support Systems).
The Technology Acceptance Model: Past, Present, and Future by Y. Lee, K.A. Kozar, and K.R.T. Larsen
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Communications of the Association for Information Systems (Volume 12, Article 50) 752-780
Before starting the analysis, the authors jointly developed a protocol to ensure consistent
analysis. Twenty-four MIS Quarterly, Information & Management, and ISR papers were first
analyzed by two of the authors. To measure inter-rater reliability, the initial analysis results were
compared to the analysis scales (e.g., major themes, type of IS, external variables). A 90% interrater reliability was found. Discrepancies were resolved through follow-up discussions. The
second reliability test was performed after finishing the coding. Three doctoral students familiar
with TAM participated in and performed the reliability test. For twenty randomly selected papers,
a 93% consistency was found.
To supplement the findings of the meta-analysis, a survey of thirty-two leading IS researchers
was conducted. Nine survey questions in open-ended format were used. Example questions
included:
•
In what ways has TAM added value to the IS field?
•
In what ways has TAM detracted from the IS field?
•
What do you feel is TAM’s future?
We initially selected two groups of IS researchers: TAM researchers and non-TAM researchers.
The selection was based on the publication productivity of researchers, especially in the MIS
Quarterly and ISR during the 1990s. Twenty TAM researchers and twenty-four non-TAM
researchers were selected. The participation was solicited through an invitation letter. A total of
thirty-two researchers (16 of them TAM researchers and 16 Non-TAM researchers) completed
the survey, a response rate of 76%.
III. RESULTS
The analysis in this section is divided into three parts. First, the chronological progress of TAM
across four separate periods is presented. Second, findings and limitations of past TAM research
are summarized. Finally, future directions are addressed.
THE CHRONOLOGICAL PROGRESS OF TAM RESEARCH
TAM did not maintain its original form. Like an organic being, TAM has ceaselessly evolved. We
investigated how TAM has made progress by dividing the past 18 years into four periods:
introduction, validation, extension, and elaboration, as shown in Figure 1.
Model Introduction Period
After introducing information systems into organizations, user technology acceptance received
fairly extensive attention [Rogers, 1983; Kwon and Zmud, 1987; Swanson, 1988]. Researchers
and practitioners expended substantial research effort determining what factors affect users’
beliefs and attitudes on the IS acceptance decision, and what factors contribute to user
resistance [Lucas et al., 1990]. As an output from those streams of research, TAM evolved from
Ajzen and Fishbein’s [1980] Theory of Reasoned Action (TRA) to “provide an explanation of the
determinants of computer acceptance that is general, capable of explaining user behavior across
a broad range of end-user computing technologies and user populations, while at the same time
being both parsimonious and theoretically justified” [Davis et al. 1989, p. 985].
After the introduction, researchers in this period performed several TAM studies mainly focused
on two streams.
•
The first attempted to replicate TAM with other technologies, longitudinal situations, and
research settings, to verify whether it is a parsimonious model.
•
The other stream compared TAM and its origin, TRA, to investigate whether TAM can be
differentiated from TRA, and whether TAM is superior to TRA.
The Technology Acceptance Model: Past, Present, and Future by Y. Lee, K.A. Kozar, and K.R.T. Larsen
Communications of the Association for Information Systems (Volume 12, Article 50) 752-780
Venkatesh & Davis
(2000)
755
Venkatesh et al.
(2003)
Model Elaboration
Gefen et al.
(2003)
Straub
(1994)
Model Extension
Adams et al.
(1992)
Davis & Venkatesh
(1996)
Model Validation
Taylor and Todd
(1995)
Davis
(1986)
Model Introduction
1986
1990
1995
2000
2003
Figure 1 Chronological Progress of TAM Research
Replication Studies. Several replication studies appeared in this period. Adams et al. [1992]
examined TAM in 5 different applications—word processors, graphics, spreadsheets, e-mail, and
v-mail—and found that, in general, TAM maintained its consistency and validity in explaining
users’ IS acceptance behavior. Davis [1993] replicated his previous study [Davis et al., 1989]
using e-mail and a text editor with 112 knowledge workers, and found that TAM successfully
explained the adoption of both technologies (R2 =0.36). Sambamurthy and Chin [1994] applied
TAM to study group attitudes toward GDSS use, and found that the ratio PU/PEOU successfully
predicted group attitude to GDSS use. Finally, Subramanian [1994] performed the replication of
the original TAM with two mailing systems’ acceptance, and found that TAM variables showed
results consistent with previous studies.
Relation of TAM and TRA. In another stream of research, researchers tried to differentiate TAM
from TRA. For example, Davis et al. [1989] compared TRA and TAM in how they measure an
MBA student’s relative facility with a word processor across two time periods—immediately after
introducing the system and 14 weeks later. They found that TAM (R2 = 0.47 at time 1, R2 = 0.51
at time 2) better explained the acceptance intention of the users than TRA (R2 = 0.32 at time 1,
R2 = 0.26 at time 2). Hubona and Cheney [1994] compared both TAM and the Theory of Planned
Behavior (TPB) model and found that TAM offers a slight empirical advantage and is a much
simpler, easier to use, and more powerful model to explain users’ technology acceptance. Taylor
and Todd [1995b] compared TAM, TPB, and Decomposed TPB through a longitudinal study of
786 students who used a computer information resource center (CIRC). They found that
Decomposed TPB and TPB gave a fuller explanation than TAM. They asked for a cautious
interpretation of the results because of the trade-off between explanatory power and complexity.
TAM addressed use intention and use with slightly lower variances, while Decomposed TPB
increased the explained variance up to only 2% of use, and to 8% of usage intention, paying the
high cost by adding 7 more variables.
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In sum, through the studies in this period, it was found that TAM could successfully predict IS
acceptance behavior under different technologies and different situations. In addition, it was
found that TAM was a much simpler, easier to use, and more powerful model of the determinant
of user acceptance of computer technology than TRA [Igbaria et al. 1997, p. 281].
Model Validation Period
Similar to researchers who insisted that most IS instruments are in the early stage of
development and thus require a rigorous validation of their measurement instruments [Jarvenpaa
et al., 1985; Moore and Benbasat, 1991; Straub, 1989], researchers in the model validation
period initiated validation studies of TAM’s original instruments. Supported by Bejar’s [1980]
suggestion noting that robust instruments greatly enhance the value of research, researchers
wanted to confirm that TAM truly uses an accurate measurement of the user’s acceptance
behavior under different technologies, situations, and tasks.
Adams et al. [1992] replicated and extended the Davis 1989 study and found both validity and
reliability of measurement for both PU and PEOU across different settings and different
information systems. Hendrickson et al. [1993, 1996] examined the test-retest reliability of the PU
and PEOU scales and found the TAM instrument to be reliable and valid in terms of test-retest
analysis.
Segars and Grover [1993] found results contrary to the previous researchers. Through
confirmatory factor analysis, they found that instead of the two-factor model (PU and PEOU), a
three-factor model, including effectiveness as a new TAM variable, is more salient. They
contended that the Adams et al. [1992] results could be attributed to its use of classical statistical
techniques.
Segars and Grover’s [1993] study earned both support and objections. Barki and Hartwick [1994]
asserted that original PU consists of distinct constructs within it and can be measured with both
items assessing perceived usefulness and perceived increase in productivity, effectiveness, and
performance. However, Segars and Grover’s study was refuted by Chin and Todd [1995]. After
performing a structural equation modeling (SEM) analysis, they concluded that a single factor PU
measure has reasonable psychometric properties, thus there is no substantive rationale to
separate PU into two dimensions (PU and effectiveness). They contend that the Segars and
Grover findings resulted from the confounding effect of changing scales and constructs in an
additive fashion to examine the overall model fit, and small numbers in the sample size.
Szajna [1994] investigated the predictive validity of TAM measurements that identify whether the
measurement can successfully predict future behavior. She found good predictive validity for PU
and PEOU through discriminant analysis of DBMS selection behavior by 47 MBA students. Davis
and Venkatesh [1996] examined whether item grouping generates bias when comparing
intermixed items. They found item grouping vs. item intermixing had no significant effect.
Therefore, Davis and Venkatesh concluded that original grouped items could be used for
predicting IS acceptance.
In sum, studies in this period extensively investigated whether TAM instruments were powerful,
consistent, reliable, and valid and they found these properties to hold. Researchers checked for
validation of the instruments every time, even when used in a different context, noting that
“no absolute measures for those constructs exist across varying technological
and organizational context…. Measurement models must be rigorously assessed
and, if necessary, respecified” [Segars and Grover 1993, p. 525].
Model Extension Period
After validation efforts confirmed the saliency of the measurement instruments, prolific expansion
efforts began to introduce new variables postulating diversified relationships between constructs
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and the search for antecedents (or external) variables of the major TAM constructs, PU and
PEOU, in an attempt to identify boundary conditions.
One distinctive feature of TAM studies in this period was to attempt model extension with external
variables which include individual, organizational, and task characteristics. For instance, Agarwal
and Prasad [1999] extended TAM with five kinds of individual difference variables as the external
variables of PU and PEOU. They found that the relationship between participation in training and
PU, between prior experiences, role with regard to technology, tenure in workplace, level of
education, and prior experience and PEOU, were predicted successfully. Igbaria et al. [1995]
investigated the effects of organizational factors and found that user training, computing support,
and managerial support significantly affect both PU/PEOU and microcomputer usage. Karahanna
and Limayem [2000] conducted a study with two technologies, e-mail and voice-mail, and found
that the determinants of the system usage and those of PU and PEOU are different among the
technologies. PU did not influence e-mail usage but social influence did, and the result was
reversed in the case of voice-mail.
Another effort in the extension period was to identify and investigate TAM’s boundary conditions.
As suggested by Adams et al. [1992], the moderating effects for TAM variables such as culture,
gender, task, user type, and IS type needed to be examined. For example, Straub [1994] applied
the TAM model in two countries with different cultures, and found that culture played an important
role in the attitude toward and choice of communication media. He found that Japanese workers
perceived fax to be more useful than did U.S. workers, but in the case of e-mail, the perception
was reversed. Gefen and Straub [1997] also investigated the effect of gender difference on IS
acceptance, and determined that gender significantly moderates the effects of PU, PEOU, and
social presence. They found that men are more affected by PU, while women are more affected
by PEOU and Subjective Norm. The influence of task type was examined by Gefen and Straub
[2000] who divided WWW usage tasks into information inquiry and product purchasing, and found
that PEOU responded differently according to the task type. PEOU significantly predicted WWW
usage for a purchasing task, but not for an inquiry task. Similarly, Moon and Kim [2001] applied
TAM in the Internet context, differentiating tasks into entertainment and work–related task. They
found that the significant factors affecting Internet usage depend on the task type. Perceived
playfulness was most pivotal for an entertainment task and PU for a work-related task on the
Internet. For different user types, Karahanna et al. [1999a] found a significant difference between
potential adopters’ IS adoption and current users’ continuous IS adoption over time. Subjective
norms significantly affect the adoption intention of potential adopters, while attitudes significantly
affect current users. Finally, Ridings and Gefen [2000] applied TAM in a situation where both the
old IS and new IS are used in parallel. The PU of the new IS increases the preference for the
new IS adoption, while that of the old IS decreases it; and PEOU of the new and old IS is the
significant determinant of PU of the new and old IS respectively.
In sum, studies during this period made tremendous strides to develop a “greater understanding
[that] may be garnered in explicating the causal relationships among beliefs and their antecedent
factors” [Chin and Gopal 1995, p. 46].
Model Elaboration Period
This period can be characterized as the elaboration of TAM in two key ways: to develop the next
generation TAM that synthesizes the previous effects and to resolve the limitations raised by
previous studies.
First, in 2000, Venkatesh and Davis [2000] and Venkatesh [2000] introduced TAM II, a new
millennium version of original TAM. TAM II synthesizes the previous efforts, and reflected the
previous request for the model’s elaboration. It clearly defines the external variables of PU and
PEOU, and provided a concrete means to advance the multi-level model. For example,
Venkatesh and Davis [2000] define the external variables of PU, such as social influence
(subjective norms) and cognitive instruments (job relevance, image, quality, and result
demonstrability). Venkatesh [2000] provides the external variables of PEOU, such as anchor
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(computer self-efficacy, perceptions of external control, computer anxiety, and computer
playfulness) and adjustments (perceived enjoyment and objective usability). Through both efforts,
the explained variance increases to 60% of PEOU (R2 = 0.6) and 40% to 60% of PU (R2 = 0.4 ~
0.6), while at the same time the variance of intention increased to 60% (R2 = 0.6).
Second, studies were performed to resolve several problems in TAM. For example, Venkatesh
[2000] performed a TAM study considering both voluntary and mandatory situations. This
longitudinal study, including Subjective Norm excluded by Davis [1989], used employees in a
working environment and measured actual usage instead of self-reported usage. Venkatesh and
Davis [2000] performed a longitudinal study with four different subject groups and information
systems in a working environment considering both voluntary and mandatory situations.
Jointly, the efforts of this period helped delineate uncovered determinants of PEOU and PU, and
thus advanced TAM as a salient theory, laying the foundation for further research. In sum, with
the inspection of the development of TAM studies across four periods, we find that TAM has
evolved continually. It underwent a normal evolution through those years of efforts, culminating in
the introduction of TAM II.
FINDINGS OF PAST TAM RESEARCH
TAM studies have been performed by many different researchers with different research
purposes, subjects, information systems, and tasks applying diverse research methodology under
different environments. Several new variables were incorporated into the original TAM, combined
with other theoretical models, re-specifying their causal relationship with major TAM variables.
These extensive research projects were published in the leading information systems journals,
drawing interest from both researchers and practitioners alike. This section investigates the
findings of these TAM studies examining a number of variables including
•
Types of Information Systems
•
Relationships Between Major TAM
Variables
•
External Variables
•
Major Limitations,
•
Numbers of Publications by Year and
by Journals
•
Most Published Authors
•
Characteristics of Research Subjects
•
Research Methodology
Types of Information Systems
Over 30 different types of information systems were used as target systems. We classified them
into four major categories:
•
communication systems,
•
general-purpose systems,
•
office systems, and
•
specialized business systems.
Each type of system was evenly applied in TAM studies (Table 1). General-purpose systems
include Windows, personal computers, microcomputers, workstations, the Internet, and other
computer facilities. More recently, the Internet was the most widely applied target technology in
TAM studies. Communication systems included e-mail, v-mail, fax, dial-up systems, and other
systems mainly used for communications. E-mail was the predominantly researched target
system, especially during the early 1990s.
The Technology Acceptance Model: Past, Present, and Future by Y. Lee, K.A. Kozar, and K.R.T. Larsen
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Table 1. Summary of Information Systems Used in TAM Studies
Type
# of IS
ISs of Each Category
E-mail (13)
Communication
Systems
25 (20%)
V-mail (6)
FAX (1)
Dial-up Systems (1)
Others (e.g., cellular) (4)
Windows (1)
PC (or Microcomputer) (9)
General Purpose
Systems
34 (28%)
WWW(or e-commerce) (17)
Workstation (3)
Computer Resource Center(2)
Groupware (2)
Word processor (16)
Spreadsheet (7)
Office
Systems
33
(27%)
Presentation S/W (6)
Database programs (2)
Groupware (2)
Computerized Model (1)
Case Tools (4)
Specialized
Business
Systems
30 (25%)
Hospital IS (Telemedicine) (5)
DSS, GSS, GDSS (7)
Experts support System (2)
Others (e.g. MRP) (11)
References
Karahanna and Straub [1999],
Straub [1994]
Karahanna and Limayem [2000]
Straub [1994]
Subramanian [1994]
Kwon and Chidambaram [2000]
Karahanna et al. [1999]
Igbaria et al.[1995], Agarwal &
Prasad [1999]
Gefen and Straub [2000]
Lucas and Spitler [1999, 2000]
Taylor and Todd [1995]
Lou et al. [2000]
Adams et al. [1992], Hubona and
Geitz [1997]
Methieson[1991],Venkatesh and
Davis[1996]
Doll et al. [1998], Hendrickson et
al. [1993]
Szajna [1994], Doll et al. [1998]
Malhotra and Galletta [1999],Lou et
al. [2000]
Lu et al. [2001]
Xia and Lee [2000], Dishaw and
Strong [1999]
Lu and Gustafson [1994],
Rawstorne et al.[2000]
Sambamuthy and Chin [1994],
Vreede et al[1999]
Gefen and Keil [1998], Keil et al.
[1995]
Gefen [2000]
Office systems include word processors and spreadsheets, the most commonly used
technologies in the office systems category. Specialized business system includes special usage
purposes and company developed systems. Case tools, DSS, MRP II, and Expert Systems are
some examples of this technology.
Relationships between Major TAM Variables
TAM’s four major variables are: Perceived Usefulness (PU), Perceived Ease of Use (PEOU),
Behavioral Intention (BI), and Behavior (B). PU is used as both a dependent and independent
variable since it is predicted by PEOU, and predicts BI and B at the same time. Behavior was
usually measured using frequency of use, amount of time using, actual number of usages, and
diversity of usage. As shown in Table 2, the relationship between PU and BI is strongly
significant. 74 studies showed a significant relationship between the two variables. These studies
stated that PU is a stronger determinant of BI (or B), noting that users willingly use the system
that has a critically useful functionality [e.g. Davis, 1989].
However, only 58 studies showed a significant relationship between PEOU and dependent
variables, indicating that PEOU is an unstable measure in predicting BI (or B). The results are
similar to the studies of Gefen and Straub [2000] — raising the controversy of the role of PEOU in
TAM — and Keil et al. [1995], who questioned the overall effects of PEOU in TAM, noting that “no
amount of PEOU will compensate for low usefulness” [p. 89].
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Table 2. Relationships between Major TAM Variables
PEOU Æ PU
69
13
19
101
Significant
Non-significant
Not Applicable
Total
PU Æ BI or B
74
10
17
101
PEOUÆ BI or B
58
24
19
101
BI Æ B
13
2
86
101
Many studies found reasons for that non-significance. For example, Subramanian [1994]
asserted that, when systems used in studies are by their inherent nature relatively easy to use,
PEOU has less or no impact on the IS acceptance decision. Igbaria et al. [1995a] explained that
the hard reality of organizations might put priority on the usefulness of computer systems rather
than the pleasure brought by them. Finally, PEOU was found as a significant antecedent of PU,
rather than a parallel, direct determinant of acceptance, and thus it can affect indirectly the
acceptance through PU [Davis et al., 1992]. As shown in Table 2, 69 studies showed a
significant relationship between PEOU and PU.
External Variables
A number of external variables were introduced into TAM as suggested by Davis [1989]. Figure 2
and Table 3 show the most frequently referred external variables that affect PU, PEOU, BI, or B,
and their relationships. The most frequently introduced variables are system quality [e.g., Igbaria
et al., 1995b], training [e.g., Igbaria et al., 1995a], compatibility, computer anxiety, self-efficacy,
enjoyment, computing support, and experience [e.g., Chau, 1996].
RELEV
DEM ON
+
+ *
SO C
PRES
+
AT T
+
*
ANX IE *
x
x
AC C
*
+
C OM PL*
x +
+
*
SN/SI/SP
VOL
* +* *
*
IN NOV
M GT SUP
/ EXP
+ + + ++
PU
UI
U
PEOU
* *
USABIL
IM G
T RIAL
+
+
PLAYF
*
V IS IB
+ +
+
ENJOY/
QUALI
x x x
FAC IL
*
* + + x
SELF/
EUS
C OM P
+
R ELAT
•AC C : Accessibility, AN X IE : A nx iety, AT T : Attitude, C O M P: C om patib ility, CO M PL: C om plexity, D E M O N : R esu lt D em onstrability,
EN JO Y : Perceived E njoym ent, EU S : E nd U ser Support, EX P : Experience, FAC IL : Facilitating C ond itions, IM G : Im ag e,
REL EV : Job R elevance, M G T SU P: M anagerial Su pport, PLAY F : P layfulness, IN N O V : Personal Innovativeness,
REL AT : R elative Advantage, SE LF : Self-E fficacy, SI/SN /SP: S ocial Influence, Subjective N orm s, and Social Pressure,
SO C PRES: Social Presence, TR IAL : Trialability, U SABIL : U sab ility, V ISIB : V isibility, V O L : V oluntariness,
*: mixed, +: significant, x: insignificant relationship
Figure 2 Relationships between External Variables and Major TAM Variables
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Table 3. Summary of Variables Used in TAM1
Variable
Voluntariness
Definition
The degree to which use of the innovation is
perceived as being voluntary, or of free will
Origin
Moore
and
Benbasat [1991]
Relative
Advantage
The degree to which an innovation is
perceived as being better than its precursor
Rogers [1983]
Compatibility
The degree to which an innovation is
perceived as being consistent with the
existing values, needs, and past experiences
of potential adopters
The degree to which an innovation is
perceived as being difficult to use
Rogers [1983]
The degree to which the results of an
innovation are observable to others
The degree to which an innovation may be
experimented with before adoption
Rogers [1983]
Rogers [1983]
Personal
Innovativeness
The degree to which use of an innovation is
perceived to enhance one’s image or status
in one’s social system
The belief that one has the capability to
perform a particular behavior
High levels of support that promotes more
favorable beliefs about the system among
users as well as MIS staffs
A construct that allows for a comparison of
systems on the actual level
of effect
regarding to complete specific tasks
An individual trait reflecting a willingness to
try out any new technology
Computer
Playfulness
The degree of cognitive spontaneity in
microcomputer interactions
Social Presence
The degree to which a medium permits users
to
experience
others
as
being
psychologically present
Person’s perception that most people who
are important to him think he should or
should not perform the behavior in question
The degree to which the innovation is visible
in the organization
The capabilities of a system to enhance and
individual’s job performance
Webster
and
Martocchio
[1992]
Fulk et al. 1987
Complexity
Observability
Trialability
Image
Self efficacy
End
Support
User
Objective
Usability
Subjective
Norms/
Social
Influence
Visibility
Job Relevance
Computer
Attitude
The degree to which a person likes or
dislikes the object
Rogers [1983]
Rogers [1983]
Bandura[1977]
Igbaria
[1995]
Card
[1980]
et
et
al.
al.
Agarwal
and
Karahanna
[2000]
Fishbein
and
Ajzen [1975]
Rogers [1983]
Thompson et al.
[1991]
Ajzen
and
Fishbein[1980]
Referred Articles
Barki and Hartwick [1994];
Venkatesh and Davis
[2000]
Moore
and
Benbasat
[1991]; Premkumar and
Potter [1995]
Chin and Gopal [1995];
Xia and Lee [2000]
Premkumar and Potter
[1995], Igbaria et al.
[1996]
Moore
and
Benbasat
1991
Moore
and
Benbasat[1991];
Karahanna et al. [1999]
Karahanna et al. [1999];
Venkatesh & Davis [2000]
Fenech [1998]; Venkatesh
and Speier [2000]
Igbaria et al. [1996];
Karahanna and Limayem
[2000]
Venkatesh and Davis
[1996]; Venkatesh [2000]
Agarwal
and
Prasad
[1998];
Agarwal and Karahanna
[2000]
Moon and Kim [2001];
Agarwal and Karahanna
[2000]
Karahanna and Straub
[1999]; Karahanna and
Limayem [2000]
Malhotra and Galletta
[1999]; Venkatesh and
Morris [2000]
Xia and Lee [2000];
Karahanna et al. [1999]
Venkatesh and Davis
[2000]; Thompson et al.
[1991]
Chau [2001]
1
We did not analyze the magnitude of effects of each variable since each study was performed
with different statistical methods, information systems, and subjects. Averaged values (e.g.
coefficient, or correlation) will deliver contaminated interpretations. Instead, we analyzed
consistency of the findings with respect to always significant, mixed, and insignificant relationship.
The Technology Acceptance Model: Past, Present, and Future by Y. Lee, K.A. Kozar, and K.R.T. Larsen
762
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Accessibility
Result
Demonstrability
Management
Support
Computer
Anxiety
Perceived
Enjoyment
System (Output
or Information)
Quality
Facilitating
Conditions
Prior Experience
- Physical accessibility: the extent to which
someone has physical access to the
hardware needed to use the system
- Information accessibility: the ability to
retrieve the desired information from the
system
The degree to which the results of
adopting/using the IS innovation are
observable and communicatable to others
The degree of support from managers to
ensure sufficient allocation of resources and
act as a change agent to create a more
conductive environment for IS success
An individual’s apprehension, or even fear,
when she/he is faced with the possibility of
using computers
The extent to which the activity of using a
specific system is perceived to be enjoyable
in its own right, aside from any performance
consequences resulting from system usage
The perception how well the system
performs tasks that match with job goals
Karahanna and
Limayem [2000]
Karahanna and Straub
[1999]; Karahanna and
Limayem [2000]
Rogers [1983]
Karahanna et al. [1999];
Venkatesh and Davis
[2000]
Igbaria et al. [1997]; Liao
and Landry [2000]
The control beliefs relating to resource
factors such as time and money and IT
compatibility issues that may constrain
usage
Experience gained
Igbaria
[1997]
et
al.
Simonson et al.
[1987]
Montazemi et al. [1996];
Gopal et al. [1994]
Davis
[1992]
al.
Chin and Gopal [1995];
Teo et al. [1999]
Venkatesh and
Davis [2000]
Lucas and Spitler [2000];
Lederer et al. [2000]
Taylor and Todd
[1995b]
Taylor and Todd [1995b];
Karahanna and Straub
[1999]
Various
Jackson et al. [1997];
Dishaw and Strong [1999]
et
Major Limitations of TAM studies
Self-reported usage is the most commonly reported limitation. Instead of measuring actual usage,
36 studies relied mainly on self-reported use assuming that self-reported usage successfully
reflects actual usage. However, self-reported usage is known to be subject to the common
method bias, which distorts and exaggerates the causal relationship between independent and
dependent variables [Agarwal and Karahanna, 2000; Podsakof and Organ, 1986]. The second
most cited limitation of the studies is the tendency to examine only one information system with a
homogeneous group of subjects on a single task at a single point of time, thus raising the
generalization problem of any single study. The use of student subjects also deteriorates
generalizability of the findings. The dominance of cross-sectional study is also an important
limitation. Since the user’s perception and intention can change over time, it is important to
measure these quantities at several points of time. However, only 13 studies performed a
longitudinal comparison. The cross-sectional study’s major weakness is that it cannot infer the
causality of the research results [Agarwal and Karahanna, 2000]. Low explanations of variance
were referred to as a major problem of TAM studies. In general, 30-40% of the variance of the
causal relationship was explained, but in some cases, only 25% was explained by the
independent variables [e.g., Chin and Gopal, 1995; Gefen and Straub, 2000]. The majority of the
studies with lower variance explanations did not consider external variables other than original
TAM variables. Other suggested limitations of TAM studies included single measurement scales,
relatively short exposure to the technology before testing, and self-selection biases of the
subjects. The detailed limitations are summarized in Table 4.
Numbers of Publications by Year and by Journals
A total of one hundred one articles using TAM in the leading information systems (IS) journals
and conferences were examined. As shown in Table 5, while there was no specific trend, the
publication of TAM studies has increased steadily. Some years had a heavier concentration of
The Technology Acceptance Model: Past, Present, and Future by Y. Lee, K.A. Kozar, and K.R.T. Larsen
Communications of the Association for Information Systems (Volume 12, Article 50) 752-780
763
Table 4. Summary of Limitations in TAM Studies
Limitations
# of
Papers
Self-reported Usage
36
Did not measure the actual usage
Venkatesh and
Davis[2000]
Single IS
18
Use only a single information system for the
research
Venkatesh[1999]
15
Inappropriate to reflect the real working
environment
Agarwal and
Karahanna [2000]
Only one organization, one department, MBA
students
Mainly performed based on cross-sectional
study
Low validity of newly developed measure, use
single item scales
Did not granulize the tasks, and test them with
the target IS
Did not adequately explain the causation of
the model
Did not classify mandatory and voluntary
situation, or assume voluntary situation
Small sample size, short exposure time to the
new IS, few considerations of cultural
difference, self-selection bias
Karahanna and
Straub [1999]
Karahanna et
al.[1999]
Agarwal and Prasad
[1998]
Student Samples (or
University
Environment)
Single Subject (or
Restricted subjects)
One Time Cross
Sectional Study
Measurement
Problems
13
13
12
Single Task
9
Low Variance
Scores
Mandatory
Situations
Others
6
3
15
Explanation
Examples
Mathieson [1991]
Igbaria et al. [1997]
Jackson et al.[1997]
Gefen and
Straub[1997]
Table 5. Publications by Years and Journals
89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 Total
MIS Quarterly
1
1
Information Systems Research
1
2
2
2
2
1
1
Journal of Management Information
Systems
1
Decision Sciences
2
Management Science
3
1
1
Information & Management
1
1
1
Data Base
2
1
1
1
Total
2
0
3
1
1
2
2
3
7
10 10
1
1
1
2
19
2
1
10
1
1
10
7
1
2
1
Hawaii International Conference on
System Sciences
1
2
2
1
Others
2
3
1
on
2
1
1
International
Conference
Information Systems
1
2
3
5
4
1
1
2
1
1
7
2
2
5
1
2
1
2
7
4
12 17 12 5
3
12
2
5
4
22
9
101
papers. In 2000 alone, 17 papers were published in the major IS journals. TAM studies were
evenly published across all the leading IS journals with the MIS Quarterly the leader. A total of 19
articles were published in the MIS Quarterly. In all but 4 of the last 15 years, at least one TAM
study was published in the MIS Quarterly. Over 10 articles each were published in ISR, JMIS,
and I&M.
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Considering that only 16-20 research articles are published in leading IS journals per year (e.g.
ISR, MISQ), TAM studies occupy around 10% of total publications. The most prolific authors are
listed in Table 6, including authors who published at least 4 papers. Those authors were shown
as author or co-authors in 50 of the one hundred one articles, thus 50% of the papers included
the dominant authors.
Table 6. Most Prolific Researchers Based on Journals in Table 5
Authors
Viswanath Venkatesh
Fred D. Davis
Detmar W. Straub
Elena Karahanna
David Gefen
Patrick Y.K. Chau
Magid Igbaria
Peter A. Todd
Anthony R. Hendrickson
Wynne W. Chin
Michael G. Morris
University
University of Maryland
University of Arkansas
Georgia State University
University of Georgia
Drexel University
University of Hong Kong
Claremont Graduate University
University of Houston
Iowa State University
University of Houston
Air Force Institute of Technology
# of Articles
12
9
8
6
6
6
5
4
4
4
4
Characteristics of Research Subjects
As shown in Table 7, the research subjects of TAM studies may be divided into two groups:
students and real-world knowledge workers. 46 studies used student subjects and 60 used
knowledge worker subjects.2 The average sample size of the studies was 211. Gender was
fairly evenly distributed across TAM studies. Thirty one studies mentioning the gender proportion
showed that 0.565 were male, and 0.435 were female. Average age of student subject was early
20’s and that of knowledge workers was early 30’s.
Table 7. Summary of Research Subjects
Subject Type
Students
Subcategory
# of Studies of Each Type
Undergraduate
28
MBA or Graduate Students
13
Merged
3
Knowledge Workers
60
Sample Size
211.2 (µ), 220.5 (σ)
Gender Proportion
Men: 56.5 %, Women: 43.5%
Ages
21.23 (student subjects), 32.31 (knowledge workers)
Research Methodology Used
Our research yielded only 13 longitudinal studies out of the 101 TAM papers studied (Table 8).
Most studies used a one-shot cross-sectional method after exposing the subjects to the new IS
through hands-on sessions or training. The majority of research incorporated questionnairebased field study. Only three studies used qualitative data, such as participatory observations and
2
Some studies used both students and practitioner subjects.
The Technology Acceptance Model: Past, Present, and Future by Y. Lee, K.A. Kozar, and K.R.T. Larsen
Communications of the Association for Information Systems (Volume 12, Article 50) 752-780
765
content analysis. Laboratory experiments were mainly conducted on students in a university
environment. Data was analyzed using regression with software such as SPSS and SAS, and
structural equation modeling, with Partial Least Square (PLS), LISREL, and AMOS. In recent
studies, LISREL was the predominantly data analysis method used.
Table 8. Summary of Research Methodology
Methodology
Longitudinal Study
Methodology
Details
13 (Yes)
88 (No)
Field Study (86)
Lab Experiment (12)
Qualitative Study (3)
PLS (18)
LISREL (30)
Analysis Method
AMOS (7)
Regression (32)
Others (e.g., Conjoint
Analysis ) (14)
Venkatesh[2000];Venkatesh and Morris [2000]
Straub [1994]; Taylor and Todd [1995]
Igbaria et al. [1995]; Agarwal and Prasad [1999]
Mathieson[1991]; Doll et al.[1998]
Briggs et al.[1999] De Vreede et al.[1999]
Sambamuthy and Chin [1994]; Agarwal and
Karahanna[2000]
Taylor and Todd[1995] Karahanna and Limayem
[2000]
Chin and Todd[1995] Fenech[1998]
Lucas and Spitler[1999] Venkatesh[1999]
Discriminate Analysis: Szajna [1994], Conjoint
Analysis:Chin and Gopal [1995]
LEADING IS RESEARCHERS’ PERSPECTIVE OF TAM RESEARCH
To strengthen our observations and prognostications, we contacted leading IS researchers to
identify their perception of TAM research. Thirty-two of forty-four queried responded to the study.
As discussed earlier, the sample included TAM researchers based on an extended Table 6 and
the authors with the most publications in ISR and MISQ from 1996 through 2001. A list of
respondents is included in the acknowledgements at the end of this paper. In this section, we
report their responses in summarized form.
Value Added by TAM Research
Question asked: “In what ways has TAM added value to the IS field?”
Two major points were made:
TAM provided a parsimonious model to examine factors leading to IS acceptance. It includes a
systematic grounding for research and focuses previously scattered work. This standardization
allows an examination of findings to bring greater meaning to mixed or inconclusive results, thus
leading to further work. Building on prior IS research, TAM conceptualized usefulness and ease
of use as important perceptions leading to intentions to adopt new systems. The IS field contains
few such foundations for its research.
“it has also provided a starting point for many extensions and elaborations, and has compared
favorably to alternative or competing models of user acceptance.“ Fred Davis
TAM provided a stream of research papers to aid and grow our knowledge about IS acceptance.
TAM strengthened the IS field by its research rigor. It is a theory “owned” by the IS research
community. In the IS field where theories are scarce, TAM served as an example for other areas
of IS research. Growing and refining the theoretical foundation with tested measurement
instruments will serve to legitimize the field in the eyes of other business disciplines. For example,
some marketing studies use TAM as a theoretical foundation.
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Shortcomings of TAM Research
Question asked: “In what ways has TAM detracted from the IS field?”
The responses from persons who felt TAM may have detracted from the field fall into four
categories.
TAM researchers may have fallen into the trap of following an incremental approach based on
replicating previous studies with minor adjustments. Some people see researchers attempting to
take advantage of the previous investment in this area and the broad appeal of TAM in the IS
field. Other disciplines built on this “cumulative tradition,” but some respondents felt this idea may
have been carried too far.
TAM research may be overdone. However, it could be argued that although possible, it was
necessary.
“it has likely focused us too much on this one theory to the detriment of others.”
Detmar Straub.
“it has received disproportional amount of attention in IS research detracting
research from more relevant research problems which may not be as easy to
investigate rigorously.” Juhani Iivari
TAM narrows what is included in studies of technology adoption. TAM’s narrow focus reduced
attention on the role of technology and design.
“it has acted as an inhibitor to more advanced theories of IS use in that people
seem stuck or distracted by the model.” Anonymous
TAM’s simplicity makes if difficult to put into practice. Practitioners may not be well served by
TAM.
“imagine talking to a manager and saying that to be adopted technology must be
useful and easy to use. I imagine the reaction would be "Duh! The more
important questions are what makes technology useful and easy to use.” Alan
Dennis
The following words are indicative of detractors of TAM:
“TAM's simplicity and ease of operationalizability also appears to have attracted
many researchers into conducting quick and easy studies by adding a variable or
relationship to TAM and comparing the slightly modified versions of TAM with its
original version. While most such studies don't get published because of lack of
contribution, they still represent scarce research efforts being somewhat wasted.”
Henri Barki
Further Exploration Needed
Question Asked: “Are there areas of TAM that need more exploration?”
From conducting the meta-analysis and the survey, three major future directions for TAM came to
the forefront.
Incorporating More Variables and Exploring Boundary Conditions. Although TAM has aided
the understanding of information systems acceptance, it was concluded that a deeper
understanding of factors contributing to ease of use and usefulness is needed. One neglected
area is examining different information systems and environments. Researchers including
Venkatesh [1999] suggested studies on multi-user systems, team-level IS acceptance, and more
complex technologies. Opportunities in study of the Internet may also exist. Previous TAM
The Technology Acceptance Model: Past, Present, and Future by Y. Lee, K.A. Kozar, and K.R.T. Larsen
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studies investigated the effects of different environments and individual differences (e.g. cultural
difference [Chau, 1996; Hu et al., 1999; Straub et al., 1997] and gender [Gefen and Straub,
1997]), but more efforts to examine the broader environmental factors including emotion, habit,
personality difference, technology change, even going beyond individual acceptance to
organizational and societal acceptance [Taylor and Todd, 1995] are necessary. Further,
mandatory settings need further study [Davis et al., 1992; Davis, 1993; Taylor and Todd, 1995b;
Venkatesh, 2000].
Social influence plays a crucial role in human behavior and decision making [Azjen, 1991; Barki
and Hartwick, 1994; Taylor and Todd, 1995b]. While TAM studies attempted to investigate the
effect of social influence on the technology acceptance decision, results were mixed. Davis
[1989], Barki and Hartwick [1994], and Mathieson [1991] found weak associations between
subjective norm and other variables. Lucas et al. [1999], Moore and Benbasat [1993], Taylor and
Todd [1995], and Thompson et al. [1991] found a significant relationship. These questions still
remain for future study. Some studies attempted to include social influence into TAM and to start
finding the boundary conditions that affect the significance of social influence [e.g. Karahanna
and Limayem, 2000; Lee et al., 2001; Venkatesh and Morris, 2000; Venkatesh and Davis, 2000].
Barki and Hartwick [1994] found that subjective norm is more important in the early stage of
system development. Taylor and Todd [1995] found subjective norm is a better predictor of
intention with inexperienced subjects. Venkatesh and Davis [2000] found that subjective norm
significantly affected intention under mandatory situations, and that it weakened over time.
However, this issue is still in the early stages of investigation, requiring more research to find the
causal linkage between social influences and IT adoption and the incorporation of new socially
influential factors. For example, social identity and norms as new social factors in social
psychology fields are candidates for investigation [Corner and Armitage, 1998].
One of the major problems of TAM studies was that TAM was applied to tasks that were too
broad.
Previous studies were mainly performed by assigning a single task to a single IS.
However, many studies of task-technology fit [Goodhue, 1995], revealed that perception of the
technology varies according to task type. For example, Karahanna and Straub [1999] recognized
that the research findings cannot be generalized under task-dependent situations. Heeding the
warning by Goodhue and Thompson [1995] that the lack of task focus in evaluating IS caused the
mixed results in IS acceptance, future TAM studies need to specify tasks more granularly.
Finally, as shown in Table 8, TAM studies mainly focused on cross-sectional studies which may
not find causal linkage between research variables [Doll and Ahmed, 1983; Igbaria et al., 1996;
1997]. Doll and Ahmed [1983] stressed the importance of longitudinal study, indicating that
users’ expectations might change as they become more familiar with IS technology, and what
was once acceptable may no longer be adequate. Qualitative study, another natural extension in
method is a more useful alternative to determine richer information with a small number of
subjects. IS researchers also recommended triangulation methods to uncover richer results than
can be found using only a single method [Karahanna et al., 1999; Lee, 1991].
Investigation of Actual Usage and the Relationships Between Actual Usage and Objective
Outcome Measures. The investigation of actual usage and the relationships between actual
usage and objective outcome measures was another suggestion. Self-reported usage is widely
used assuming that it is a reasonable predictor of actual system usage [e.g. Agarwal and Prasad,
1999; Jackson et al., 1997; Sheppard et al., 1988]. However, the risk of distorted research
findings by using self-reported usage instead of actual objective usage was cautioned by several
studies [Lederer et al., 2000; Karahanna and Straub, 1997; Rawstorne et al., 2000; Straub et al.,
1995; Szajna, 1996]. For example, Straub et al. [1995] found that research based on selfreported usage shows distinctly different results with that of actual usage. Self-reported usage
was also found to be the major reason for common method bias [Igbaria et al., 1997], and derives
its socially desirable answers from the halo effect [Orne, 1979]. The problem was negatively
interpreted by cognitive dissonance theory [Festinger, 1957] and self-perception theory [Bem,
1967]. While it is difficult to measure actual usage under diverse restrictions such as privacy
consideration, research should continue to pursue measuring actual usage. The investigation of
The Technology Acceptance Model: Past, Present, and Future by Y. Lee, K.A. Kozar, and K.R.T. Larsen
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Communications of the Association for Information Systems (Volume 12, Article 50) 752-780
the relationships between actual usage and objective outcome measures (e.g. performance,
productivity, quality) is another issue to be examined. TAM studies were performed under the
general assumption that relationship between IS usage and satisfaction, productivity, and quality
is positive [e.g., Chau, 1996; Trice and Treacy, 1986]. For example, Bowen [1986] asserted that
performance gains by using IS did not materialize if users did not willingly accept the systems.
However, only a few studies attempted to verify those relationships [Igbaria et al., 1995; Lucas
and Spitler, 1999]. Therefore, new studies are required to determine whether that assumption
can be supported by empirical testing. This recommendation follows Davis et al.’s [1989]
suggestion that
“practitioners and researchers should not lose sight of the fact that usage is only
a necessary but not sufficient, condition for realizing performance improvements
due to information technology” [p. 1000].
That is, usage does not assure bottom line benefits. TAM will provides more insightful value if the
model examines the causal chain between IS investment, IS use, and objective IS value.
Significant Changes in TAM Research. Some of the IS scholars surveyed suggested major rather
than incremental changes in TAM research. For example,
“I think it will be well-used in future work, but that more studies of TAM per se
will die out, unless someone can find a new addition to TAM and the paradigm
shifts.” Alan Dennis
TAM certainly made a contribution, but it may be time to address issues of concern to IS
practitioners that can greatly impact their bottom line, and increase their longevity in IS
management. Furthermore, a number of other theories that have been applied to the causal
linkage of a user’s IS acceptance behavior may be aligned with TAM research. Social Cognitive
Theory, Diffusion of Innovation Theory, the Theory of Reasoned Action/Theory of Planned
Behavior, the Triandis Model, Human Computer Interaction research, the Technology Transition
Model [Briggs et al., 1999], and Social Network Theory [Robertson, 1989] are representative
examples. Integration efforts are required to obtain a better understanding of IT adoption [Hu et
al., 1999]. Examples of such efforts include TAM II [Venkatesh and Davis, 2000] and the Unified
Theory of Acceptance and Use of Technology [Venkatesh et al., 2003].
IV. CONCLUSIONS
This study examined the progress of TAM and the findings of TAM research through the metaanalysis of 101 articles published between 1986 and 2003. This study found that TAM has
progressed continually during that time and was elaborated by researchers, resolving its
limitations, incorporating other theoretical models or introducing new external variables, and
being applied to different environments, systems, tasks, and subjects. In addition, through a
meta-analysis and a survey of IS researchers, this study identified many of TAM’s rich findings.
and carefully predicted the future trajectory of TAM studies.
TAM has come a long way. While there are still contradictory views on TAM research considering
the previous and current research trends, many exciting directions remain for making future
discoveries.
ACKNOWLEDGMENT
The authors thank Maryam Alavi, Henri Barki, Anitesh Barua, Wynne Chin, Vivek Choudhury,
Fred Davis, Alan Dennis, David Gefen, Varun Grover, Tony Hendrickson, Sid Huff, Iivari Juhani,
Elena Karahanna, Rob Kauffman, Dorothy Leidner, Hank Lucas, Vijay Mookerjee, Mike Morris,
Barrie Nault, Jayesh Prasad, Blaize Reich, Dan Robey, Detmar Straub, Bernadette Szajna, Peter
Todd, Joe Valacich, Betty Vandenbosch, Viswanath Venkatesh, Rick Watson, Ron Weber,
The Technology Acceptance Model: Past, Present, and Future by Y. Lee, K.A. Kozar, and K.R.T. Larsen
Communications of the Association for Information Systems (Volume 12, Article 50) 752-780
Weidong Xia, and Bob Zmud for their participation and
research.
769
comments on the survey for this
Editor’s Note: This article was received on October 17,2003 and was published on December 28, 2003. It
was with the authors one week for one revision.
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APPENDIX I. REFERENCES INCLUDED IN META-ANALYSIS
Authors
Year
Adams, D. A., R.R.
Nelson, P.A. Todd
1992
Agarwal, R., J. Prasad
1998
Agarwal, R., J. Prasad
1999
Agarwal, R., E.
Karahanna
2000
Atkinson, M., C. Kydd
1997
Barki, H., J. Hartwick
1994
Bhattacherjee, A.
2001
Bhattacherjee, A.
2001
Briggs, R.O., M.
Adkins, D. Mittleman,
J. Kruse, S. Miller, J.F.
Nunamaker
Briggs, R.O., G. D.
Vreede, J.F.
Nunamaker
Chau, P.Y.K.
1999
Chau, P.Y.K.
1996b
Chau, P.Y.K.
2001
Chau, P.Y.K., P.J. Hu
2002
Chau, P.Y.K., P.J. Hu
2002
Chen,L., M.L.
Gillenson, D.L. Sherrell
Chin, W.W., P.A. Todd
2002
1995
Chin, W.W., A. Gopal
1995
Chismar,W.G., S.W.
Patton
Davis, F.D.
2003
2003
1996a
1989
Title
Perceived usefulness, ease of use, and
usage of information technology: A
replication
A conceptual and operational definition of
personal innovativeness in the domain of
information technology
Are individual differences germane to the
acceptance of new information
technologies?
Time flies when you're having fun
cognitive absorption and beliefs about
information technology usage
Individual characteristics associated with
world wide web use: an empirical study of
playfulness and motivation
Measuring user participation, user
involvement, and user attitude
An empirical analysis of the antecedents
of electronic commerce service
continuance
Understanding information systems
continuance: an expectation-confirmation
model
A technology transition model derived
from field investigation of GSS use
abroad the U.S.S. CORONADO
Collaboration engineering with ThinkLets
to pursue sustained success with group
support systems
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MISQ 17(4)
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I &M 33(1)
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The Technology Acceptance Model: Past, Present, and Future by Y. Lee, K.A. Kozar, and K.R.T. Larsen
Communications of the Association for Information Systems (Volume 12, Article 50) 752-780
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ICIS-21
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LIST OF ACRONYMS
ATT
B
BI
Decomposed TPB
DSS
PEOU
PU
PE
SN
TAM
TRA
TPB
Attitude
Behavior
Behavioral intention
Decomposed theory of planned behavior
Decision support systems
Perceived ease of use
Perceived usefulness
Perceived enjoyment
Subjective norm
Technology acceptance model
Theory of reasoned action
Theory of planned behavior
ABOUT THE AUTHORS
Younghwa Lee is a doctoral candidate at the Leeds School of Business, University of Colorado
at Boulder. His research interest is in web usability, technology acceptance, and IT security and
ethics. He is an ICIS 2003 doctoral consortium fellow. His research is published in several
journals including Communications of the ACM and Computers & Security, and in several
conferences including International Conference on Information Systems and Academy of
Management .
The Technology Acceptance Model: Past, Present, and Future by Y. Lee, K.A. Kozar, and K.R.T. Larsen
780
Communications of the Association for Information Systems (Volume 12, Article 50) 752-780
Kenneth A. Kozar is Professor of Information Systems in the Leeds School of Business, the
University of Colorado at Boulder. His interests are in human and organizational impacts of
technology. He published in a number of journals, served two terms as an Associate Editor of the
MIS Quarterly, and was the chair of the Society for Information Management's International Paper
Award Competition. He is the author of "Humanized Information Systems Analysis and Design:
People Building Systems for People" (McGraw-Hill, 1989).
Kai R.T. Larsen is Assistant Professor of Information Systems in the Leeds School of Business,
the University of Colorado at Boulder. His research interests center around interdisciplinary
approaches to information systems implementation, and interorganizational networks.
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The Technology Acceptance Model: Past, Present, and Future by Y. Lee, K.A. Kozar, and K.R.T. Larsen
ISSN: 1529-3181
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