Cultural-historical activity theory, or CHAT, with its roots in Soviet psychology, and Marx and Engels, has emerged as a significant phenomenon in the last few decades. This video (part 1 of 2) introduces the notion of CHAT, locating it historically in the work of Vygotsky, Leont’ev and Engeström. It then develops the notion of activity system analysis based on Engeström’s work.
In Part 2 of the video, activity theory is applied to the problem of behavior change and HIV and AIDs. The video focuses on sexual activity as the activity of the system, and illustrates how an activity system analysis, through an historical and current account of the activity, provides a way of understanding lack of behavior change in response to HIV and AIDS.