Symmetrical and asymmetrical sources of variance in temporal generalization


Journal Article

Ten rats were trained in a temporal generalization task (the peak procedure) with variations in the time of reinforcement, the intertrial interval, and the mean and variance of the duration of nonfood trials. There were three types of asymmetry in the temporal generalization gradients: positive skew, secondary rise, and positive asymptote. Asymmetrical gradients can occur as a result of asymmetrical sources of variance, multiplicative combinations of symmetrical sources of variance, and effects of anticipation of the end of a trial and the conditions of the next trial. Ten additional rats were trained with a single time of reinforcement, a limited time of reinforcement availability, long and fixed durations of nonfood trials, and a nonresponse requirement for ending a trial. These conditions markedly reduced all asymmetrical sources of variance and led to very symmetrical gradients. These results demonstrate that none of the asymmetrical sources of variance necessarily has a substantial influence on observed temporal generalization gradients. © 1991 Psychonomic Society, Inc.

Full Text

Cited Authors

  • Church, RM; Miller, KD; Meck, WH; Gibbon, J

Published Date

  • September 1, 1991

Published In

Volume / Issue

  • 19 / 3

Start / End Page

  • 207 - 214

Electronic International Standard Serial Number (EISSN)

  • 1532-5830

International Standard Serial Number (ISSN)

  • 0090-4996

Digital Object Identifier (DOI)

  • 10.3758/BF03197878

Citation Source

  • Scopus