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The unified theory of acceptance and use of technology (UTAUT) is a technology acceptance model formulated by Venkatesh and others in "User acceptance of information technology: Toward a unified view". The UTAUT aims to explain user intentions to use an information system and subsequent usage behavior. The theory holds that four key constructs: 1) performance expectancy, 2) effort expectancy, 3) social influence, and 4) facilitating conditions; being the first three direct determinants of usage intention and behavior, and the fourth a direct determinant of use behavior. Gender, age, experience, and voluntariness of use are posited to moderate the impact of the four key constructs on usage intention and behavior. The theory was developed through a review and consolidation of the constructs of eight models that earlier research had employed to explain information systems usage behaviour (theory of reasoned action, technology acceptance model, motivational model, theory of planned behavior, a combined theory of planned behavior/technology acceptance model, model of personal computer use, diffusion of innovations theory, and social cognitive theory). Subsequent validation by Venkatesh et al. of UTAUT in a longitudinal study found it to account for an impressive 70% of the variance in Behavioural Intention to Use (BI) and about 50% in actual use (citation?). ==Application== * Koivumäki ''et al. applied UTAUT to study the perceptions of 243 individuals in northern Finland toward mobile services and technology and found that time spent using the devices did not affect consumer perceptions, but familiarity with the devices and user skills did have an impact.〔T. Koivimäki, A. Ristola, and M. Kesti, “The perceptions towards mobile services: An empirical analysis of the role of use facilitators,” Personal & Ubiquitous Computing, vol. 12, no. 1, pp. 67–75, 2008〕 * Eckhardt ''et al. applied UTAUT to study social influence of workplace referent groups (superiors, colleagues) on intention to adopt technology in 152 German companies and found significant impact of social influence from workplace referents on information technology adoption.〔A. Eckhardt, S. Laumer, and T. Weitzel, “Who influences whom? Analyzing workplace referents’ social influence on IT adoption and non-adoption,” Journal of Information Technology, vol. 24, no. 1, pp. 11–24, 2009〕 * Curtis ''et al. applied UTAUT to the adoption of social media by 409 United States nonprofit organizations. UTAUT had not been previously applied to the use of social media in public relations. They found that organizations with defined public relations departments are more likely to adopt social media technologies and use them to achieve their organizational goals. Women considered social media to be beneficial, and men exhibited more confidence in actively utilizing social media.〔L. Curtis, C. Edwards, K. L. Fraser, S. Gudelsky, J. Holmquist, K. Thornton, and K. D. Sweetser, “Adoption of social media for public relations by nonprofit organizations,” Public Relations Review, vol. 36, no. 1, pp. 90–92, 2010〕 * Verhoeven ''et al. applied UTAUT to study computer use frequency in 714 university freshmen in Belgium and found that UTAUT was also useful in explaining varying frequencies of computer use and differences in information and communication technology skills in secondary school and in the university.〔J. C. Verhoeven, D. Heerwegh, and K. De Wit, “Information and communication technologies in the life of university freshmen: An analysis of change,” Computers & Education, vol. 55, no. 1, pp. 53–66, 2010〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Unified theory of acceptance and use of technology」の詳細全文を読む スポンサード リンク
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