Discover a faster, simpler path to publishing in a high-quality journal. PLOS ONE promises fair, rigorous peer review, broad scope, and wide readership – a perfect fit for your research every time.
Learn More Submit Now
Click through the PLOS taxonomy to find articles in your field.
For more information about PLOS Subject Areas, click here.
< Back to Article
Summary of the review design.
More »
The activity system as a basic unit of analysis in CHAT.
Source: Engeström (1987, p. 213) © Yrjö Engeström. Adapted by permission of Yrjö Engeström. Permission to reuse must be obtained from the rightsholder.