Other Personal Traits
The Premacks stated that the chimpanzees had specific traits, such as favorite trainers, and that some chimpanzees, such as Gussie, seemed more fearful than the others. As previously noted, the Premacks noticed that Jessie seemed to be the brightest of the nine chimpanzee subjects. For example, she did not hesitate to unmask a masked researcher, which none of the other chimpanzees attempted. It is clear that the Premacks attempted to provide a humane, supportive environment for the chimpanzees.
Vauclair notes that chimpanzees will become distressed in the absence of their favorite companion.
Read more about this topic: The Mind Of An Ape
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