All-or-none versus progressive approach in an approach-avoidance conflict

Milton A. Trapold, Neal E. Miller, Edgar E. Coons

Research output: Contribution to journalArticlepeer-review


Rats were trained to run down a 100-ft.-long runway for food; shock was then introduced at the goal and increased on subsequent trials until S failed to reach the goal. Under 24-hr. deprivation, test trials were run with S started near the goal and then far from the goal; the 1st movement of most Ss was toward the goal under both conditions. When hunger was reduced to 4 hr. and then increased by 24 hr. on each successive trial, all Ss approached part way and then stopped on most trials, generally approaching closer to the goal on the trials conducted under conditions of greater hunger. From Psyc Abstracts 36:01:1EK93T. (PsycINFO Database Record (c) 2006 APA, all rights reserved).

Original languageEnglish (US)
Pages (from-to)293-296
Number of pages4
JournalJournal of Comparative and Physiological Psychology
Issue number3
StatePublished - Jun 1960



ASJC Scopus subject areas

  • General Medicine


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