xxx/ellauri087.html on line 616: Cultural-historical activity theory (CHAT) is a theoretical framework which helps to understand and analyse the relationship between the human mind (what people think and feel) and activity (what people do). It traces its origins to the founders of the cultural-historical school of Russian psychology L. S. Vygotsky and Aleksei N. Leontiev. Tää oli Esa Sariolan lempilapsi, jonka se kiusasi höynähtäneitä veistoluokissa.
xxx/ellauri087.html on line 618: Elsewhere CHAT has been defined as "a cross-disciplinary framework for studying how humans purposefully transform natural and social reality, including themselves, as an ongoing culturally and historically situated, materially and socially mediated process". Core ideas are: 1) humans act collectively, learn by doing, and communicate in and via their actions; 2) humans make, employ, and adapt tools of all kinds to learn and communicate; and 3) community is central to the process of making and interpreting meaning – and thus to all forms of learning, communicating, and acting.
xxx/ellauri087.html on line 620: The term CHAT was coined by Michael Cole and popularized by Yrjö Engeström to promote the unity of what, by the 1990s, had become a variety of currents harking back to Vygotsky's work. Engeström's now famous diagram, or basic activity triangle, – (which adds rules/norms, intersubjective community relations, and division of labor, as well as multiple activity systems sharing an object) – has become the principal third-generation model among the research community for analysing individuals and groups. Engeström summarizes the current state of CHAT with five principles:
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