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Ontogenetic differences in the expression of conditioned visual aversions
Author(s) -
Jagielo Joyce A.,
Miller James S.,
Spear Smith Jennifer,
Spear Norman E.
Publication year - 2003
Publication title -
developmental psychobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.055
H-Index - 93
eISSN - 1098-2302
pISSN - 0012-1630
DOI - 10.1002/dev.10081
Subject(s) - psychology , ontogeny , expression (computer science) , biology , developmental psychology , communication , endocrinology , computer science , programming language
We examined ontogenetic differences in the expression of conditioned visual aversions. Sprague‐Dawley‐derived rats, 16 or 21 days of age, were conditioned with either an element (brightness) or compound (brightness/odor) CS+ and tested for their aversion to the common element (brightness). Aversions to the brightness cue were assessed by either a traditional test of preference between the CS+ brightness and a contrasting brightness or by assessment of freezing in the presence of either brightness cue. The results indicated that strength of conditioning as well as the expression of overshadowing/potentiation was dependent on the age of the animal and on the technique used to assess conditioning. © 2003 Wiley Periodicals, Inc. Dev Psychobiol 42: 123–130, 2003