[Analysis of the informational and activating components of reinforcement in a conditioned reflex experiment].

The reinforcement in adaptive behaviour performs at least two functions: satisfaction of specific need (activational component) and estimation of signal significance of the conditioned stimulus while comparing the nervous model of the stimulus with current afferentation (informational component). In usual conditioning experiments with permanent reinforcement these components concide and therefore do not differ. However, they may be separated in the case of probabilistic reinforcement by changing stimuli contingency and shifting motivational level. With this aim the diagrams of probabilistic stimuli and reactions space, semantic and pragmatic matrices are worked out, allowing to estimate correlations of these parameters of conditioning experiments. Comparative psychophysiological investigations showed the possibility of determination of species peculiarities in behavioural choice strategies among various animals under above mentioned conditions.