A study designed to investigate the effects of permanent maternal separation in infant rhesus monkeys, 60, 90, and 120 days of age, and housed individually or in Paris. Monkeys separated at 90 days and housed individually showed the highest levels of disturbance. (DP)

Presents Attachment Q-Set adapted for study of monkeys as described by Kondo-Ikemura and Waters in this issue. (HTH)

Presents scoring key for the original Attachment Q-Set and that adapted for study of secure-base behavior of monkeys, as described by Kondo-Ikemura and Waters in this same issue. (HTH)

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)

Investigates a chimpanzee's capacity to recognize representations of problems and solutions, as well as its ability to perceive the relationship between each type of problem and its appropriate solutions using televised programs and photographic solutions. (HM)

Infant abuse and neglect were investigated in five families of group-living pigtail macaques over five generations. Neglect was mostly limited to first-born and newborns; closely related rather than distantly related females were more prone to abuse; and infants with siblings previously abused were at highest risk. Results provide evidence of…

A study of the effect of the twin sibling relationship upon interactions between monkey mothers and infants. Findings provided strong support for the prediction that the twin sibling presence decreases the amount of behavior directed from infant to mother. Differences in maternal behavior were concluded to be reactions to differences in infant…

Used adaptation of Attachment Q-Set (AQS) with 24 infant-mother monkey dyads to clarify the secure-base concept. Found that infants of high-ranking monkeys scored higher than those of low-ranking ones, suggesting the origins of the secure-base phenomenon, as well as the importance of exploring infant secure-base behaviors in families of different…

Provides an overview of basic and applied studies for which primates are appropriate subjects. Summarizes the advantages, limitations, and constraints of using nonhuman primates in research. (RT)