Transferência de função em classes de equivalência formadas pelo procedimento "go/no-go" com estímulos compostos

• Autores: Renato Roberto Vernucio, Paula Debert
• Localización: Acta comportamentalia: revista latina de análisis del comportamiento, ISSN 0188-8145, Vol. 24, Nº. 3, 2016, págs. 315-330
• Idioma: portugués
• Títulos paralelos:
  • Transfer of function in equivalence classes established using the "go/no-go" procedure with compound stimuli
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• Resumen
  • português

    O presente trabalho avaliou quantitativamente a transferência de função em classes de equivalência estabelecidas pelo procedimento go/no-go com estímulos compostos. Participaram do experimento cinco estudantes universitários. Foram treinadas as relações AB, AC, CD e DE, e testadas em extinção as relações BD, DB, BE e EB para duas classes de estímulos. Os estímulos A de cada classe eram fotos de expressões faciais e os demais estímulos eram figuras abstratas. Um instrumento de diferencial semântico foi utilizado para oferecer uma medida quantitativa da transferência de função. Todos os estímulos foram avaliados antes e depois do treino e teste de relações. Foi encontrado que houve transferência de função dos estímulos de fotos de expressões faciais para os estímulos de figuras abstratas após o estabelecimento de classes de equivalência. Para nenhum dos participantes foi observado que estímulos com menores distâncias nodais em relação às fotos de expressões faciais passaram a ser avaliados mais semelhantemente a elas do que estímulos com maior distância nodal. Portanto, não foi produzido o mesmo efeito de distância nodal observado quando o procedimento matching-to-sample padrão é utilizado. Esses resultados apontam uma importante diferença entre o procedimento go/no-go com estímulos compostos e o procedimento matching-to-sample.

  • English

    The aim of the study was to evaluate quantitatively the transfer of function in equivalent classes established using the go/no-go procedure with compound stimuli. Five undergraduate students took part in the experiment. Ten experimental stimuli were used, divided in two classes (A1, B1, C1, D1, E1, A2, B2, C2, D2, E2).A1 stimulus was a photograph of a facial expression of happiness, A2 was a photograph of a facial expression of anger and the remaining stimuli were abstract figures. The procedure consisted of four phases. In the first phase, all stimuli were evaluated using a semantic differential instrument.

    This instrument was an assessment questionnaire, in which each page had one experimental stimulus on the top followed by thirteen bipolar rating scales containing seven intervals and antonym adjectives on its end points. In the second phase, the go/no-go procedure with compound stimuli was used to train the relations AB, AC, CD and DE. Using a computer, each compound was successively presented on the screen and the participant’s task was to click or not to click with the mouse. When acompound containing elements of the same classwas presented, the clicking response was followed by reinforcement, while the other situations weren’t followed by programmed consequences. In the third phase, it was evaluated, in extinction, the emergence of the relations BD, DB, BE and EB. In the fourth phase, the same semantic differential instrument was used to reevaluate all experimental stimuli. As a result, four out of five participants established equivalence classes.For these participants, it was found that, after the equivalence classes were established, the abstract figures related to the photograph of a facial expression of happiness became, on average, more positively evaluated, while the abstract figures related to the photograph of a facial expression of anger became, on average, more negatively evaluated. These results suggest that the establishment of equivalence classes produced transfer of function from the photographs of facial expressions to the abstract figures. It was not observedfor any of the participants that stimuli evaluation was an inverse function of the nodal distance.

    Therefore, the nodal distance effect obtained when the standard matching-to-sample procedure is employed was not observed using the go/no-go procedure with compound stimuli. These results indicate an important difference between the go/no-go procedure with compound stimuli and the matching-to-sample procedure. The absence of the nodal distance effect when the go/no-go procedure with compound stimuli is used could be attributedto differences in the way stimuli are presented in the go/no-go procedure with compound stimuli compared to the matching-to-sample procedure.