These studies inflict unimaginable emotional suffering on hundreds of primates by separating them from their mothers at various early ages.

Chimpanzees, exposed to partial isolation for two to four years, were then exposed to “mild stress” to assess their reactions
Adolescent chimpanzees who had been maternally deprived in infancy/youth were given LSD to see if it might have a therapeutic effect
Maternally deprived infant chimpanzees were used to study the effects of food deprivation and administration of amphetamines on their behavior
Chimpanzee infants/children were deprived of their chimpanzee mother and given to a human to be raised (cross-fostering)
Given the intensity of the mother-child bond for chimpanzees in the wild, this research ranks among the cruelest of all.

It is a known fact that to capture a chimpanzee infant in the wild, his/her mother will inevitably have to be killed – so strong is her instinct to protect her baby – along with several if not all the adults of the group. Free-living chimpanzee mothers are exceptionally protective and caring, and any deviation from this is the result of aberrant behavior. (See our video bibliography list for the film: People of the Forest.)

Ripping infants from their mothers to study the sad effect this has on their emotional, social, and cognitive development and well-being is like dropping apples again and again to continually prove the theory of gravity.