In a study of interspecies understanding, 75 naive human listeners classified 18 vocalizations of monkeys into 1 of 7 semantic categories, which were also related to the behavioral situation. Results suggest that both species share vocalization patterns signalling fear, aggression, dominance, and emotional neutrality. (45 references) (LB)

In this article, research on nonhuman animals is reviewed to show that there is no discontinuity between humans and other animals. For both, high density is not necessarily harmful. Rather, the effect of high density depends on other factors in the situation. (Author)

The research on parental deprivation done at the Wisconsin primate laboratories and related laboratories is summarized. Social isolation and certain other social conditions were observed in their effects on aggressive behavior. Isolate-reared rhesus monkeys show more abnormality in postures and movements than do socially reared monkeys from…