Two-cue discrimination learning by pigtail monkeys

Pretraining and discrimination reversal learning by rhesus monkeys

Groups of five to seven macaques were trained on repeated reversals of a visual (or spatial) discrimination habitafter no pretraining, extended discrimination training, or repeated reversal training on spatial (or visual) cues. Neither sortof pretraining had a significant effect on reversal learning on the second cue. These results indicate that monkeys' capacity to develop generalized "win-sta...

Pattern discrimination learning with rhesus monkeys.

Rhesus monkeys were trained to criterion on a two-stimulus and a fivestimulus pattern discrimination task. The probabilities of response to the various stimuli throughout learning are examined for individual subjects, and it is fOlL'1d that the subjects exhibit consistency in the order and manner in which incorrect stimuli are eliminated. This suggests a simple mathematical description of the p...

Generalization effects in human discrimination learning with overt cue identification.

Cue similarity and reinforcement schedule were covaried in 2 experiments (total N =408) utilizing a 2 choice discriminative event prediction task with and without overt cue identification. P(^4i|Si) was a linear function of TT% =P(Ei [ 82) when the cues (pure tones) were highly confusable and a U-function when Si and 82 were highly discriminable. P(A 11 Si) was independent of in and did not dif...

Discrimination Reversal Learning in Capuchin Monkeys (Cebus apella)

Role of Reinforcement in Discrimination Learning Set in Monkeys

Following a review of empirical research on the role of reinforcement in learning-set formation, the major theoretical explanations of learning-set formation in monkeys are analyzed. Studies showing that a reward can function to decrease as well as increase the probability of choosing an object cast doubt upon theories based on an automatic strengthening function of reward. Hypothesis or strate...