Effect of handling on positive and negative contrast effects

Jeffrey W. Fagen, Robert F. Rycek

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The effects of early handling on the exhibition of positive and negative contrast effects were investigated. Over two 4‐day testing sessions, animals were given alternating 1‐min access periods to 2 bottles containing either 32 or 4% sucrose solutions. Measures of lick rate and latency to switch bottles revealed that both handled and nonhandled animals exhibited contrast effects of equal magnitudes. The results did not support an emotional interpretation of contrast effects but were interpreted as support for the perceptual theory of this phenomenon.

Original languageEnglish (US)
Pages (from-to)37-45
Number of pages9
JournalDevelopmental Psychobiology
Issue number1
StatePublished - Jan 1980
Externally publishedYes

ASJC Scopus subject areas

  • Developmental and Educational Psychology
  • Developmental Neuroscience
  • Developmental Biology
  • Behavioral Neuroscience


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