Selective Breeding for Negative Contrast in Consummatory Behavior

Charles F. Flaherty, Kathleen L. Krauss, Grace A. Rowan, Patricia S. Grigson

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18 Scopus citations


Rats showing either large or small reductions in licking following a shift from 32% to 4% sucrose were selectively bred for 7 generations. Rats from the 2 resulting lines reliably differed in successive negative contrast and in activity (radial-arm maze and open field). Differences in activity and contrast were not correlated. Heritability (h2) of the reaction to sucrose shift was reliable in the last 6 filial generations and equaled 0.64 in the F7 generation. The 2 lines did not differ (a) in response to the absolute rewarding value of sucrose or cocaine; (b) in open-field defecations or thigmctaxis; (c) in anticipatory contrast; or (d) in responsivity to midazolam. Responsivity to reward reduction may involve a relatively delimited psychological process that is amenable to selection.

Original languageEnglish (US)
Pages (from-to)3-19
Number of pages17
JournalJournal of Experimental Psychology: Animal Behavior Processes
Issue number1
StatePublished - Jan 1994

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Experimental and Cognitive Psychology


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