ABSTRACT
Consideration of the learning capabilities of animals has attracted the attention of scientists, philosophers, theologians, naturalists, and interested layman for many centuries. Particular emphasis has centered on questions regarding the degree to which the cognitive capabilities of various animal species resemble those of human beings. Compelling evidence that advanced nonhuman primates have patterns of cognitive functioning that are characteristic of normal humans but not of most, if not all, non-primate animal species comes from two basic lines of research. Tests of learning set involve presenting subjects with a long series of six-trial discrimination problems. In the present test battery, each subject was given a total of 600 six-trial problems; each problem presented a new pair of three dimensional objects that differed in color and shape. After completion of the formal battery of learning tests, each subject was run through an additional test of its hearing capability.
