Propriedades discriminativas de contingências de variação e repetição

AUTOR(ES)

Alessandra da Silva Souza

DATA DE PUBLICAÇÃO

2006

RESUMO

The literature has indicated that the relation between behavior and its consequences can exert discriminative functions for a subsequent behavior. The objective of the present study was to investigate the discriminative proprieties of vary and repeat contingencies. For that, pigeons were exposed to a matching-to-sample procedure. In the sample link, a mix vary repeat schedule was in effect. The task was to emit sequences of four responses distributed in two keys illuminated by a red light. In the vary contingency, sequences with a relative frequency equal or less than 10% (threshold) was legible for reinforcement. In the repeat contingency, the emission of only two sequences (among the 16 possible ones) was followed by reinforcement. After the exposure to the sample (vary or repeat), two comparison stimuli were presented (self-report link). The correct comparison depended on the contingency that was in effect previously in the sample: for the vary contingency, the correct alternative was to peck the key illuminated by a white light, and for the repeat contingency, to peck the key illuminated by a green light. The procedure comprised two experimental phases: baseline and testing. In the Baseline Phase, the threshold was set at 10%. In the Testing Phase, the threshold was manipulated across different conditions, such that the vary contingency became progressively lenient. During baseline, the percentage of correct self-reports was above 75% (subjects J55 and J52) or 60% (subject J53), and obtained discriminability indexes (d) were between 1.75 and 2.5. During testing, increases in the threshold produced decreases in the discriminability of the contingencies, while decreases in the threshold produced increases in that discriminability. In conjunction, the results from baseline and testing phases suggest that self-reports were under discriminative control of the vary and repeat contingencies. The relevance of those results become evident when one considers that variation and repetition are fundamental behavioral processes for adapting to the environment. Hence, discriminating the contexts were those repertories are relevant, critically contribute to adaptive processes.

ASSUNTO(S)

psicologia variação repetição discriminação auto-relato

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