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Starting in 1973, Herbert Terrace led an ambitious project to examine the capability of chimps to develop sign language. The chimp participant was born at the Institute for Primate Studies in Oklahoma and was taken from his mother after about a week and handed to Stephanie LaFarge who acted as a surrogate parent. The chimp was effectively adopted. In a recent piece in Nature, Terrace explains why he initiated the project:
“After serving as a graduate assistant at Harvard University with behavioural psychologist B. F. Skinner, I heard that Allen and Beatrix Gardner at the University of Nevada, Reno, were teaching sign language to a chimpanzee named Washoe. But when I looked at their data, I wasn’t sure that the chimp’s sequences of hand signs were grammatical. I decided to do a study to collect everything a chimp signed, and document the circumstances. We wanted to have full records of the discourse between the infant chimp and the caretaker.”
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