OBJECTIVE:

To determine the learning pattern and the inter and intraindividual differences observed in training for voluntary entry and positioning of Sapajus apella monkeys in an experimental apparatus (chair for primates), as well as to quantify the necessary time to obtain the expected results.

MATERIALS AND METHODS:

Three male monkeys underwent a two months period of habituation to the experimenters, followed by daily operant conditioning training sessions using the clicker technique and positive reinforcement through edible rewards, with daily training sessions of 20 min for a period of four months. The sessions were recorded for later analysis of temporal parameters and frequency of presentation of the desired behaviors.

RESULTS:

Interindividual analysis revealed significant differences in the comparison of the obtained scores for each animal in the latencies and frequencies of presentation of the desired behaviors. Intraindividual analysis comparing different time windows over the training period revealed significant contrast in the animals' performances within distinct periods, reflected in the individual learning curves that reached a plateau for different behavioral parameters for each animal.

CONCLUSION:

The use of positive reinforcement proved to be effective in training for positioning in the chair for primates. Possibly, individual factors significantly influenced learning patterns. The application of positive reinforcement techniques positively affects the human-primate relationship, influences the well-being of animals and, despite the need for time to reach the desired behavioral patterns, it is an important technique of refinement and animal management.