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Article
Training with controlled reinforcer density: implications for models of timing
Journal of Experimental Psychology: Animal Behavior Processes
  • Lewis A Bizo, Southern Cross University
  • K Geoffrey White, University of Otago
Document Type
Article
Publication Date
1-1-1997
Peer Reviewed
Peer-Reviewed
Abstract

Pigeons discriminated between the 1st and 2nd halves of a trial. Trial duration was varied both within and between sessions in a 2-alternative free-operant psychophysical choice procedure. Two keys were illuminated either both red or both green at the beginning of a trial. Half the trials were long (red keys), and half were short (green keys). Session duration was kept constant across conditions. Left-key responding was reinforced only during the 1st half of a trial, and right-key responding was reinforced only in the 2nd half of a trial. Contrary to predictions of the behavioral theory of timing (P. R. Killeen and J. G. Fetterman), estimates of pacemaker period increased with increases in the trial duration despite constancy of reinforcement rate. Weber fractions were relatively constant across timed intervals, consistent with Weber's law. The present experiment is discussed with regard to implications for current theories of timing.

Disciplines
Citation Information

Bizo, LA & White, KG 1997, 'Training with controlled reinforcer density: implications for models of timing', Journal of Experimental Psychology: Animal Behavior Processes, vol. 23, no. 1, pp. 44-55.