Nonhuman primates as models of hemispheric specialization

As a result of his observation that the understanding of human cognition derives mostly from the study of human adults, Terrace (1993) called for the development of comparative psychology in the field of cognitive sci-ences. According to Terrace, "the study of cognitive processes in animals provides a unique opportunity to investigate the phylogeny and ontogeny of cognition " (Terrace, 1993, p. 162). There are several aspects of human cognition (e.g., list learning and imagery) that can be investigated by the use of nonverbal tasks. Psychologists ' work with pigeons and monkeys (e.g., for chunking in memory, Terrace, 1987; for serial learning, Terrace