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Did observing others success decrease the latency to the observer's first success?

You have great data and could also look at social learning. Did you already check or do you have an idea of whether those individuals that observed the apparatus being operated by successful dyads were more likely to succeed in their first few trials than those individuals who succeeded (and thus could not learn about the apparatus by observing others) first?

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This is a great question and something we have thought about quite a bit. However, the size and complexity of the testing environment made it impossible to tell whether chimpanzees who weren't participating were observing those who were working. There was so much going on at any one time, even if they appeared to be looking in the direction of the apparatus, it was entirely possible they were looking at something else (including the other chimps that were around). I think, though, it would be very interesting to see if chimps can learn about how a cooperative task works by observing others in a more controlled setting.

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