異種見本合わせ課題によるニホンザルの概念学習の実験的分析

抄録

“The object concept” in Japanese monkeys was investigated with a heterogeneous matching-to-sample task. First, it was confirmed that naive Japanese monkeys were able to learn this original task. Then, the transfer tests were carried out with the comparison stimuli modified with respect to four dimensions: size, background, rotation, and shape. The early low and later high accuracies during the test sessions suggested that some common properties of the modified stimuli came to control subjects' responding. Thus, the formation of “the object concept” in Japanese monkeys was demonstrated experimentally. It was concluded that reinforcement of the same responses under several different stimuli which shared some common properties was necessary before the subjects formed “the object concept”.