Behavior: The Education of Sarah

As the brightest of the big apes, the chimpanzee may be man's nearest intellectual neighbor. How near? Science has long sought to discover in the intelligent chimp the gift of language, the incomparable skill that distinguishes mankind from all other living things. Until now, that search has been fruitless; the chimp lacks the capacity for speech that is innate in every normal human infant. But in Psychology Today magazine, Psychologist David Premack of the University of California at Santa Barbara demonstrates that the chimpanzee can converse with man in ways other than by...

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