Menez DM

Language: Spanish
References: 20
Page: 958-975
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ABSTRACT

In Scalar Expectancy Theory (SET), the response rule for temporal bisection assumes the comparison of a probe duration —stored in the working memory— with the short and long durations —recovered from the reference memory-— (similarity rule; Gibbon, 1981). Allan and Gerhardt (2001), by means of a procedure that discourages using the reference memory (Rodríguez-Gironés y Kacelnik, 2001), found that subjects produced a criterion duration value given the available referents, and based their decision on the comparison of this criterion with the probe durations, thus rejecting the SET similarity rule. In this study, this assertion was evaluated by attempting to form a criterion and make it biased. For this, 16 high school students were divided into two groups that received two durations, short and long, (context phase). The “short” group categorized tones of 100 and 200 ms, while the “long” group categorized tones of 1800 and 3200 ms. These values were above and below the reference durations of 400 and 1600 ms from the subsequent bisection task. In the following phase, these conditions were reverted. A mixed ANOVA from the average bisection point (PB) confirmed changes in the psychometric function that were dependent on the context-induced bias. The implications of these findings for the formulation of the comparison rule in the temporal bisection task in humans (Allan, 2002; Siegel, 1986) are discussed.

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