Technology acceptance model
The Technology Acceptance Model (TAM) is an information systems theory that models how users come to accept and use a technology. The model suggests that when users are presented with a new technology, a number of factors influence their decision about how and when they will use it, notably:
- Perceived usefulness (PU) - This was defined by Fred Davis as "the degree to which a person believes that using a particular system would enhance his or her job performance".
- Perceived ease-of-use (PEOU) - Davis defined this as "the degree to which a person believes that using a particular system would be free from effort" (Davis 1989).
The TAM has been continuously studied and expanded-the two major upgrades being the TAM 2 (Venkatesh & Davis 2000 & Venkatesh 2000) and the Unified Theory of Acceptance and Use of Technology (or UTAUT, Venkatesh et al. 2003). A TAM 3 has also been proposed (Venkatesh & Bala 2008).
TAM is one of the most influential extensions of Ajzen and Fishbein’s theory of reasoned action (TRA) in the literature. It was developed by Fred Davis and Richard Bagozzi (Davis 1989, Bagozzi, Davis & Warshaw 1992). TAM replaces many of TRA’s attitude measures with the two technology acceptance measures— ease of use, and usefulness. TRA and TAM, both of which have strong behavioural elements, assume that when someone forms an intention to act, that they will be free to act without limitation. In the real world there will be many constraints, such as limited freedom to act (Bagozzi, Davis & Warshaw 1992).
Bagozzi, Davis and Warshaw say:
- Because new technologies such as personal computers are complex and an element of uncertainty exists in the minds of decision makers with respect to the successful adoption of them, people form attitudes and intentions toward trying to learn to use the new technology prior to initiating efforts directed at using. Attitudes towards usage and intentions to use may be ill-formed or lacking in conviction or else may occur only after preliminary strivings to learn to use the technology evolve. Thus, actual usage may not be a direct or immediate consequence of such attitudes and intentions. (Bagozzi, Davis & Warshaw 1992)
Earlier research on the diffusion of innovations also suggested a prominent role for perceived ease of use. Tornatzky and Klein (Tornatzky & Klein 1982) analysed the adoption, finding that compatibility, relative advantage, and complexity had the most significant relationships with adoption across a broad range of innovation types. Eason studied perceived usefulness in terms of a fit between systems, tasks and job profiles, using the terms "task fit" to describe the metric (quoted in Stewart 1986)
Several researchers have replicated Davis’s original study (Davis 1989) to provide empirical evidence on the relationships that exist between usefulness, ease of use and system use (Adams, Nelson & Todd 1992; Davis 1989; Hendrickson, Massey & Cronan 1993; Segars & Grover 1993; Subramanian 1994; Szajna 1994). Much attention has focused on testing the robustness and validity of the questionnaire instrument used by Davis. Adams et al. (Adams 1992) replicated the work of Davis (Davis 1989) to demonstrate the validity and reliability of his instrument and his measurement scales. They also extended it to different settings and, using two different samples, they demonstrated the internal consistency and replication reliability of the two scales. Hendrickson et al. (Hendrickson, Massey & Cronan 1993) found high reliability and good test-retest reliability. Szajna (Szajna 1994) found that the instrument had predictive validity for intent to use, self-reported usage and attitude toward use. The sum of this research has confirmed the validity of the Davis instrument, and to support its use with different populations of users and different software choices.
Segars and Grover (Segars & Grover 1993) re-examined Adams et al.’s (Adams, Nelson & Todd 1992) replication of the Davis work. They were critical of the measurement model used, and postulated a different model based on three constructs: usefulness, effectiveness, and ease-of-use. These findings do not yet seem to have been replicated. However, some aspects of these findings were tested and supported by Workman (Workman 2007) by separating the dependent variable into information use versus technology use.
Mark Keil and his colleagues have developed (or, perhaps rendered more popularisable) Davis’s model into what they call the Usefulness/EOU Grid, which is a 2×2 grid where each quadrant represents a different combination of the two attributes. In the context of software use, this provides a mechanism for discussing the current mix of usefulness and EOU for particular software packages, and for plotting a different course if a different mix is desired, such as the introduction of even more powerful software (Keil, Beranek & Konsynski 1995).
Venkatesh and Davis extended the original TAM model to explain perceived usefulness and usage intentions in terms of social influence and cognitive instrumental processes. The extended model, referred to as TAM2, was tested in both voluntary and mandatory settings. The results strongly supported TAM2 (Venkatesh & Davis 2000).
In an attempt to integrate the main competing user acceptance models, Venkatesh et al. formulated the Unified Theory of Acceptance and Use of Technology (UTAUT). This model was found to outperform each of the individual models (Adjusted R square of 69 percent) (Venkatesh et al. 2003). UTAUT has been adopted by some recent studies in healthcare.
Independent of TAM, Scherer (Scherer 1986) developed the Matching Person & Technology Model in 1986 as part of her National Science Foundation-funded dissertation research. The MPT Model is fully described in her 1993 text (Scherer 2005, 1st ed. 1993), "Living in the State of Stuck," now in its 4th edition. The MPT Model has accompanying assessment measures used in technology selection and decision-making, as well as outcomes research on differences among technology users, non-users, avoiders, and reluctant users.
TAM has been widely criticised, despite its frequent use, leading the original proposers to attempt to redefine it several times. Criticisms of TAM as a "theory" include its questionable heuristic value, limited explanatory and predictive power, triviality, and lack of any practical value. (Chuttur 2009) Benbasat and Barki suggest that TAM "has diverted researchers’ attention away from other important research issues and has created an illusion of progress in knowledge accumulation. Furthermore, the independent attempts by several researchers to expand TAM in order to adapt it to the constantly changing IT environments has lead [sic] to a state of theoretical chaos and confusion" (Benbasat & Barki 2007). In general TAM focuses on the individual 'user' of a computer, with the concept of 'perceived usefulness', with extension to bring in more and more factors to explain how a user 'perceives' 'usefulness', and ignores the essentially social processes of IS development and implementation, without question where more technology is actually better, and the social consequences of IS use. For a recent analysis and critique of TAM see Bagozzi (Bagozzi 2007).
See also 
- Technology adoption lifecycle
- Technology lifecycle
- Theory of Planned Behavior
- product life cycle management
- Diffusion of Innovations
- Domestication theory
- new product development
- research and development
- list of marketing topics
- Lazy User Model
- Adams, D. A; Nelson, R. R.; Todd, P. A. (1992), "Perceived usefulness, ease of use, and usage of information technology: A replication", MIS Quarterly 16: 227–247
- Ajzen, I.; Fishbein, M (1980), Understanding attitudes and predicting social behavior, Englewood Cliffs, NJ: Prentice-Hall
- Bagozzi, R.P. (2007), "The legacy of the technology acceptance model and a proposal for a paradigm shift.", Journal of the Association for Information Systems 8(4): 244–254.
- Benbasat, I.; Barki, H. (2007), "Quo vadis, TAM?", Journal of the Association of Information Systems, 8 (4): 211–218
- Bagozzi, R. P.; Davis, F. D.; Warshaw, P. R. (1992), "Development and test of a theory of technological learning and usage.", Human Relations, 45(7): 660–686
- Bass, F. M. (1969), "A new product growth model for consumer durables", Management Science 15: 215–227
- Bass, F. M. (1986), The adoption of a marketing model: Comments and observation, Cambridge, Mass.: Ballinger In V. Mahajan & Y. Wind (Eds.), Innovation Diffusion Models of New Product Acceptance.
- Budd, R. J. (1987), "Response bias and the theory of reasoned action", Social Cognition 5: 95–107
- Chuttur, M.Y. (2009), Overview of the Technology Acceptance Model: Origins, Developments and Future Directions, Indiana University, USA, Sprouts: Working Papers on Information Systems
- Czaja, S. J.; Hammond, K; Blascovich, J. J.; Swede, H (1986), "Learning to use a word processing system as a function of training strategy", Behaviour and Information Technology 5: 203–216
- Davis, F. D. (1989), "Perceived usefulness, perceived ease of use, and user acceptance of information technology", MIS Quarterly, 13(3): 319–340
- Davis, F. D.; Bagozzi, R. P.; Warshaw, P. R. (1989), "User acceptance of computer technology: A comparison of two theoretical models", Management Science 35: 982–1003
- Hendrickson, A. R.; Massey, P. D.; Cronan, T. P. (1993), "On the test-retest reliability of perceived usefulness and perceived ease of use scales", MIS Quarterly 17: 227–230
- Keil, M.; Beranek, P. M.; Konsynski, B. R. (1995), "Usefulness and ease of use: field study evidence regarding task considerations", Decision Support Systems, 13(1): 75–91
- King, W. R.; He, J. (2006), "A meta-analysis of the technology acceptance model", Information & Management, 43(6): 740-755
- Legris, P.; Ingham, J.; Collerette, P. (2003), "Why do people use information technology? A critical review of the technology acceptance model", Information & Management, 40(3): 191–204
- Scherer, M. J. (2005), Living in the State of Stuck, Fourth Edition, Cambridge, MA: Brookline Books.
- Scherer, M. J. (2004), Connecting to Learn: Educational and Assistive Technology for People with Disabilities, Washington, DC: American Psychological Association (APA) Books
- Scherer, M. J. (2002), Assistive Technology: Matching Device and Consumer for Successful Rehabilitation, Washington, DC: APA Books.
- Segars, A. H.; Grover, V. (1993), "Re-examining perceived ease of use and usefulness: A confirmatory factor analysis", MIS Quarterly 17: 517–525
- Stewart, T. (1986), Task fit, ease-of-use and computer facilities, Norwood, NJ: Ablex, pp. 63–76 In N. Bjørn-Andersen, K. Eason, & D. Robey (Eds.), Managing computer impact: An international study of management and organizations
- Subramanian, G. H. (1994), "A replication of perceived usefulness and perceived ease of use measurement", Decision Sciences, 25(5/6): 863–873
- Szajna, B. (1994), "Software evaluation and choice: predictive evaluation of the Technology Acceptance Instrument", MIS Quarterly, 18(3): 319–324
- Tornatzky, L. G.; Klein, R. J. (1982), "Innovation characteristics and innovation adoption-implementation: A meta-analysis of findings", IEEE Transactions on Engineering Management, EM-29: 28–45
- Venkatesh, V.; Davis, F. D. (2000), "A theoretical extension of the technology acceptance model: Four longitudinal field studies", Management Science, 46(2): 186–204
- Venkatesh, V. (2000), "Determinants of perceived ease of use: Integrating control, intrinsic motivation, and emotion into the technology acceptance model", Information systems research 11 (4), pp. 342–365
- Venkatesh, V.; Morris, M. G.; Davis, G. B.; Davis, F. D. (2003), "User acceptance of information technology: Toward a unified view", MIS Quarterly, 27(3): 425–478
- Venkatesh, V.; Bala, H. (2008), "Technology Acceptance Model 3 and a Research Agenda on Interventions", Decision Sciences, 39(2): 273–315
- Wildemuth, B. M. (1992), "An empirically grounded model of the adoption of intellectual technologies", Journal of the American Society for Information Science, 43(3): 210–224
- Workman, M. (2007), "Advancements in technology: New opportunities to investigate factors contributing to differential technology and information use.", International Journal of Management and Decision Making 8(2): 318–342