Accession Number:

AD0770484

Title:

Formation of Extinction Sets in Monkeys.

Descriptive Note:

Progress rept.,

Corporate Author:

ARMY MEDICAL RESEARCH LAB FORT KNOX KY

Personal Author(s):

Report Date:

1973-08-13

Pagination or Media Count:

10.0

Abstract:

Discrimination sophisticated, Old World monkeys received 108 two-choice problems each containing four to eight discrimination trials followed by four extinction trials for four animals and by ten extinction trials for four animals. Following this, they received 108 additional problems with extinction trial length reversed. With ten extinction trials per problem, an orderly increased in the efficiency of extinction occurred, with one-trial extinction occurring in a large proportion of problems. Virtually no tendency to extinguish occurred with four extinction trials per problem. There was a marked increase in responses to the formerly negative stimulus on the second extinction trials. Author

Subject Categories:

  • Psychology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE