. Adventures with animals and plants. Biology. Fig. 277 This chimpanzee has learned that he will get food by pulling on the rope. The food is placed in a car- rier attached to the other end of the rope. (dr. robert YERKES, YALE UNIVERSITY) In Other experiments carried on at Yale University, chimps have shown an astonishing abiUty to learn and reason. Chimpanzees were taught to g^et their own food at "; They use poker chips of different sizes and colors in place of coins. They soon learn to distin- guish between their different "coins" and to hoard the more valuab
. Adventures with animals and plants. Biology. Fig. 277 This chimpanzee has learned that he will get food by pulling on the rope. The food is placed in a car- rier attached to the other end of the rope. (dr. robert YERKES, YALE UNIVERSITY) In Other experiments carried on at Yale University, chimps have shown an astonishing abiUty to learn and reason. Chimpanzees were taught to g^et their own food at "; They use poker chips of different sizes and colors in place of coins. They soon learn to distin- guish between their different "coins" and to hoard the more valuable ones. When poker chips are distributed, even after the chimpanzees have been well fed and while not in sight of the chimpomat, they will fight for the most valuable "; It is clear that experiences are stored and associations made. Tools that help in reasoning. You have stored up an incredible number of ex- periences in your memory, far more than any other animal; you have a much larger cerebrum. But you have another advantage. Men have developed certain tools which all other animals lack, tools which aid them in getting experiences. They have developed speech and writ- ing. Because of speech and writing you can learn from others what you cannot experience directly yourself; and you can learn in minutes or hours what other- wise would take years or a lifetime of ex- perience to learn. Thus you can store up countless experiences and draw on them to help you reason. Therefore, much of your behavior as you grow up is of the kind which involves reasoning, rather than trial and error. Behavior and emotions. In describing the unlearned and learned responses of man and certain other vertebrates we have scarcely referred to one very impor- tant part of behavior. You all know the feelings of anger, joy, sorrow, amuse- ment, hope, fear, surprise, love, and hate. All of you have experienced these feel- ings or emotions, although you may find yourself unable to define any
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Keywords: ., bookcentury1900, bookpublisherbostondcheath, booksubjectbiology
