Accession Number : AD0681073

Title :   NOVELTY LEARNING SETS IN RHESUS MONKEYS,

Corporate Author : TEXAS UNIV AUSTIN RADIOBIOLOGICAL LAB

Personal Author(s) : Brown,W. Lynn ; Overall,John E. ; Blodgett,H. C.

Report Date : NOV 1968

Pagination or Media Count : 5

Abstract : Thirty-three rhesus monkeys--7 normal, 13 given low-dose radiation, and 13 given high-dose radiation--were presented with 12 object-quality discrimination problems each day for 16 days. Four trials were allowed on each problem. Each problem involved one new or novel stimulus and one stimulus which had appeared in the preceding problem. Half the time, the stimulus brought forward had been positive (rewarded) and half the time negative (nonrewarded) in the preceding problem. In each problem, the new or novel stimulus was made positive (rewarded) and the stimulus retained from the preceding problem, regardless of previous sign, became negative. The monkeys attained significant first-trial solution of the successive problems. Previous exposure to whole-body radiation did not produce significant differences in performance in this experiment. A significantly greater likelihood of error resulted when the positive stimulus was retained with reversed sign than when the negative stimulus was retained without reversed sign. The relative difficulty of the positive-brought-forward with reversal and the negative-brought-forward without reversal was found to depend on the degree of training. (Author)

Descriptors :   (*MONKEYS, WHOLE BODY IRRADIATION), (*LEARNING, MONKEYS), RADIOBIOLOGY, RADIATION EFFECTS, MEDICAL RESEARCH, GAMMA RAYS, NEUTRONS, CONDITIONED RESPONSE, TRANSFER OF TRAINING, MEMORY(PSYCHOLOGY)

Subject Categories : Psychology
      Radiobiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE