Male rhesus monkeys (Macaca mulatta) 3 years of age were studied socially before and
after ten weeks of confinement in a vertical-chamber apparatus designed to facilitate
production of psychopathological disturbance. This study represents an initial effort to move
beyond the use of young monkeys in a depression research program. Chamber confinement
results in a significant increase in contact clinging between animals and a decrease in
locomotion following removal from the apparatus. These behavior patterns are very atypical …