Two experiments were conducted with rats to investigate variables responsible for the effectiveness of using a safe platform in two-way avoidance training and to evaluate the relative efficacy of several theoretical positions (conflict reduction, reinforcement, and freezing attenuation) that were offered to explain the wide differences in…

Examines the effects of cage size on stereotyped and normal locomotion and on other abnormal behaviors in singly caged animals, whether observed abnormal behaviors tend to co-occur, and if the development of an abnormal behavior repertoire leads to reduction in the number of normal behavior categories. (Author/RK)

Presents three experiments that explore whether inescapable shock of long duration and moderate intensity (LoShk) produces an avoidance-escape deficit (called an interference effect) by causing animals to learn to respond less actively or by causing them to learn to be "helpless". (Editor)

An internal scale of 17 behavior categories was constructed from data on 120 pairs of rhesus monkeys while they were establishing a social relationship. Data were obtained by a procedure analogous to that used in human psychophysical scaling. (Editor)