[Arrangements for and probabilistic prognosis by schizophrenic patients].

The authors created in experimental conditions different sets: in one case sets for guessing accidental successive stimula, in others--to situations "play with an opponent". It was established that paranoid schizophrenic patients with a short period of the disease create their prognoses on the basis of a probability structure to produced stimula. In a protracted form of the disease the outcome of experience (to win--to lose) becomes more significant. In simple forms of schizophrenia the capability of making a prognosis appears to be more impaired. These disturbances are related either to the ability to catch the probability structure of the succession of stimula, either to use the correct knowledge of it.