Monkeys are trained to a stimulus sequence - low brightness warning light, a bright-safe light, a bright-shock light. Response during bright-safe produces food reward and prevents shock. Results of variations in the stimulus sequence indicate that if an unpredictab experiential capacities for control, it induces aberrations of behavior that range in intensity, diversity,and persistence from what in humans would be called neurotic to psychotic. M. Woolf and J.H.Masserman.
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