Effects of Stimulus-Response Compatibility on the STROOP Tasks

Oh, Eonmi; 오은미; Chung, Chan Sup; 정찬섭

Abstract

Two experiments were performed to evaluate the adaquacy of three different explanations for the Stroop effect which are based on the relative speed of processing, the stimulus-response compatibility, and stimulus internal code compatibility, respectively with a couple of modified word-color and word-position tasks using manual response. As a method of examining whether the effectiveness of the selective attention differs over two types or task, the fixed-block and random-trial procedures were used. In the fixed-block procedure, the stimulus attribute be reported was primed at the beginning of a fixed block of trials, while in the random-trial procedure, toc stimulus attribute was primed at the beginning of each trial. Processing of the color attribute was faster than that of the w attribute and symmetrical interference occured in the word-color tasks from both fixed-block and random than procedures. Processing of the position attribute was faster than the word attribute and the response to the w attribute was interfered by the irrelevant position attribute in the word-position stimulus task only from ha random-trial procedure. These results indicate that S-R compatibility is a more adequate concept to explain the interference in a Stroop task than the concept of processing speed and the attributes of word-color stimulus are more difficult to be selectively attended than those of word-position stimulus.

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Article Contents

Vol.4

Effects of Stimulus-Response Compatibility on the STROOP Tasks

Abstract

The Korean Journal of Cognitive and Biological Psychology