Acquisition and testing of gestural signs in four young chimpanzees.

@article{Fouts1973AcquisitionAT,
  title={Acquisition and testing of gestural signs in four young chimpanzees.},
  author={R S Fouts},
  journal={Science},
  year={1973},
  volume={180 4089},
  pages={
          978-80
        }
}
Two male and two female chimpanzees were each taught ten signs of American Sign Language. The acquisition rates of the signs were compared on the basis of the number of minutes required in training to reach a criterion of five consecutive unprompted correct responses. After the ten signs had been acquired, the chimpanzees were tested in a double-blind procedure for nine of the signs. All four chimpanzees acquired all of the signs. Some signs were consistently easier to acquire than others, and… CONTINUE READING

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