The effects of amount of information in the Stroop color word test

Abstract

The processing time of the relevant (color) and irrelevant (word) stimulus dimensions in a Stroop color word test were each varied by manipulating the amount of information in the color and word sets from which the stimuli were obtained. Interference in the Stroop task was found to increase with increases in relevant and irrelevant stimulus information. It was concluded that the findings of increased interference with increases in both word and color processing time supported a perceptual conflict interpretation of Stroop task interference. © 1977 Psychonomic Society, Inc.