Icek Ajzen (born 1942, Chełm, Poland) is a social psychologist and professor emeritus at the University of Massachusetts Amherst. He received his doctorate from the University of Illinois at Urbana–Champaign, and is best known for his work, with Martin Fishbein, on the theory of planned behavior.Ajzen, I. (1985). From intentions to actions: A theory of planned behavior. In J. Kuhl & J. Beckmann (Eds.), Action-control: From cognition to behavior (page 1, line 39). Heidelberg: Springer. Ajzen has been ranked the most influential individual scientist within social psychology in terms of cumulative research impactNosek, B. A., Graham, J., Lindner, N. M., Kesebir, S., Hawkins, C. B. et al. (2010). Cumulative and career-stage citation impact of social-personality psychology programs and their members. Personality and Social Psychology Bulletin, 36, 1283–1300. doi:10.1177/0146167210378111 and, in 2013, received the Distinguished Scientist Award from the Society of Experimental Social Psychology.Distinguished Scientist Award Recipients His research has been influential across diverse fields such as advertising, health psychology, and environmental psychology, and has been cited over 280,000 times.Google Scholar
For 2024 he was awarded the BBVA Foundation Frontiers of Knowledge Award in the category "Social Sciences".BBVA Foundation Frontiers of Knowledge Award 2024
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