A DISCRIMINATION PROCEDURE BASED ON THE PERCEPTION OF AUDITORY NOVELTY: MONKEYS AND CHINCHILLAS.
ARMY MEDICAL RESEARCH LAB FORT KNOX KY
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Through four experiments with monkeys and chinchillas, five questions are answered concerning a paradigm for auditory discrimination. In the paradigm, different sounds were paired in a series of two-sound tests of discrimination. For any one test, one of the sounds was presented at the rate of once every 15 sec for 12 to 24 presentations. Fifteen seconds after the last presentation, the second sound of the test was presented, and the animal was required to escape shock. Successive tests were separated by 2 min of silence. Even though the test was always changed after the one escape trial, animals learned to avoid when the second sound of the test was presented. Animals also made an avoidance to the first presentation of the sound of the new problem, and this response showed a rapid decrement with successive repetitions. This decrement was interpreted as a reflection of the loss of a sounds novelty. Author
- Anatomy and Physiology