Unconditioned response rate of the white rat in a bar-pressing apparatus.

Abstract

Study of the unconditioned response rates of 40 rats in a Skinner-type apparatus under 22-hour thirst show, over a period of daily test-periods, an extinction-like decrease in response frequency and variability, with the achievement of a final comparatively steady operant level. A similar study on animals under 22¼-hr. hunger drive gave similar results, with a general increase in the frequency of response and variability. (PsycINFO Database Record (c) 2006 APA, all rights reserved)