Individual activity style research in Soviet psychology is reviewed. Its stages and characteristics are marked out. The shortcomings of existing individual activity style paradigm (statelyness, retrospectivity, psychocentrism) are stated and their overcoming by object-deterministic approach proposed. The conditiality of individual activity style by physical environment factors, brain structures and objective laws of professional activity is noted. Objective determination of individual activity style and the study of correlation of physical laws and their psychic reflections and the latter's transformation into artificial systems (language, music, ets.) are discussed.