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  • Title: Ontogenetic differences in the expression of conditioned visual aversions.
    Author: Jagielo JA, Miller JS, Spear Smith J, Spear NE.
    Journal: Dev Psychobiol; 2003 Mar; 42(2):123-30. PubMed ID: 12555277.
    Abstract:
    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.
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