General, applied and systemic-structural activity theories; goal concept in psychology; cognitive and motor actions; self-regulation

Activity theory has been developed in the former Soviet Union for the period of more than 70 years. It also received recognition in the West, and particularly in the USA. In this work, we present critical analysis of the translation and interpretation of the basic concepts of activity theory in the psychological publications in the West from the systemic-structural activity theory perspectives. According to SSAT framework, activity is understood as a process and a structure that consists of hierarchically organized units that unfolds in time. We will consider basic concepts of activity theory and will outline some difficulties which Western scientists experience in their interpretation and application of the theory in science and practice.