The role of injection cues in the associative control of the US pre-exposure effect in flavour aversion learning.
Two experiments, using rats as subjects, examined the role of contextual cues in producing the unconditioned stimulus (US) pre-exposure effect in conditioned taste aversion. Experiment 1 showed a significant US pre-exposure effect, when the pre-exposure was conducted in a familiar context, and that a change of context between the pre-exposure and conditioning phases did not attenuate this effect. Experiment 2 demonstrated that extinction of injection-related cues after the pre-exposure stage attenuated the US pre-exposure effect, when the pre-exposure was conducted in either a familiar or a novel context. Taken together, these results support the associative explanation of the US pre-exposure effect in terms of blocking, incorporating a role for injection-related cues in the context blocking analysis of the US pre-exposure effect.
de Brugada
Isabel
I
Departamento de Psicología Experimental y Fisiología del Comportamiento, Universidad de Granada, Granada, Spain. dbrugada@ugr.es
González
Felisa
F
Cándido
Antonio
A
D000818:Animals; D001245:Association Learning / Q000502:physiology*; D001362:Avoidance Learning / Q000502:physiology*; D003214:Conditioning, Classical; D003463:Cues; D004327:Drinking Behavior / Q000187:drug effects; D005108:Extinction, Psychological; D005260:Female; D006799:Housing, Animal; D007266:Inhibition, Psychological; D007274:Injections, Intraperitoneal; D018021:Lithium Chloride / Q000008:administration & dosage / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar; D021641:Recognition, Psychology; D012439:Saccharin; D013649:Taste / Q000502:physiology*
D012439:Saccharin; D018021:Lithium Chloride