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Plan Model - An Activity Theory Based Approach

The Activity Theory, initiated by three researchers of the cultural historical school of Russian psychology, L. S. Vygotsky, A. N. Leont'ev and A. R. Luria, in the period from 1920s to 1930s, aims to explain the development of human psychology when we do purposeful activities. Recently, the theory has again drawn much attention in some fields of information technology such as human-computer interaction, Computer Supported Collaborative Work (CSCW). However, the theory still seems to lack of a suitable formalism. This causes some real problems related to the clarity of key concepts and representation of activities. Those issues have limited the development of the theory. Therefore, our research aims to resolve them by presenting a formalism for the Activity Theory which is called plan model.