%0 Journal Article
%T Est¨ªmulo discriminativo de extin£¿£¿o produzido por respostas de observa£¿£¿o em pombos
%A Tomanari
%A Gerson Yukio
%J Psicologia: Reflex£¿o e Cr¨ªtica
%D 2011
%I Universidade Federal do Rio Grande do Sul
%R 10.1590/S0102-79722011000300019
%X food-deprived pigeons were given a series of trials in which half ended with response- independent food presentation and half without it. during a trial, pecking the key could change its color from white to green (s+) or red (s-), depending on whether food was programmed or not. in baseline conditions, pecks produced both stimuli (colors) on a 15-s variable-interval schedule. in two different conditions, tandem vi drh was applied to produce either s+ or s-. results showed that the tandem contingency resulted in a general decrease in the discriminative stimulus production, markedly to s+, but not to s-. the findings are consistent with the uncertainty-reduction model of conditioned reinforcement.
%K observing response
%K conditioned reinforcement
%K delay-reduction model
%K uncertainty-reduction model
%K pigeons.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0102-79722011000300019&lng=en&nrm=iso&tlng=en