[The theory of functional systems and probabilistic prognosis of behavior]

The article is dedicated to possible probability prediction of behavior in system organization of behavioral acts. System mechanisms of anticipation of required results of behavioral activity by living organisms adapted to stable and changing conditions of life are discussed. The author proposes that in all forms of behavior, an organism strictly predicts parameters for satisfaction of dominating needs of results that constitute the goal of a given form of behavior. In author's opinion, the probabilistic prognosis concerns only methods, acts and attendant emotional states, as well as possible ways of attaining the results (i.e., the means rather than action parameters).