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Latent inhibition and facilitation of conditioned taste aversion in preweanling rats
Author(s) -
Gaztañaga Mirari,
ArandaFernández P. Ezequiel,
DíazCenzano Elena,
Chotro M. Gabriela
Publication year - 2015
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.21263
Subject(s) - taste aversion , latent inhibition , facilitation , conditioning , psychology , stimulus (psychology) , classical conditioning , unconditioned stimulus , taste , developmental psychology , neuroscience , cognitive psychology , statistics , mathematics
Early in ontogeny, taste preexposure has been found to induce latent inhibition as well as produce a facilitation of conditioned taste aversion (CTA). In this study, the effect of taste preexposure on CTA was investigated in 13–14 day old rats as a function of taste preexposure (0, 1, or 3 trials) and unconditioned stimulus intensity (LiCl: 0, 0.15, or 0.30 M). After one conditioning trial, with the low intensity US, an aversion was only observed after taste preexposure (facilitation). When using the strong US, an aversion was found without preexposure while latent inhibition was observed with 3 preexposure trials. In conclusion, stimulus preexposure can either facilitate conditioning or produce latent inhibition in infant rats, depending on the amount of stimulus preexposure and the intensity of the US. © 2014 Wiley Periodicals, Inc . Dev Psychobiol 57: 96–104, 2015.