Abstract
The speed of classification of six alternative ink colors into two categories of three colors each was measured in tasks for which the colors were displayed as either XXXX patterns or incongruent words (Stroop stimuli). Substantial interference from the words occurred when the classification required grouping nonadjacent hues (red, yellow, and blue vs. orange, green, and purple) regardless of whether subjects received exclusive practice with this classification. Interference also occurred when the classification required grouping adjacent hues (red, orange, and yellow vs. green, blue, and purple), but only if this classification was intermixed within blocks of trials with the nonadjacent classification; subjects who received exclusive practice with the adjacent classification sorted the Stroop stimuli as rapidly as the XXXX stimuli.
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This research was supported by a research graint-in-aid from the University of Nebraska Research Council, and was conducted while the first author was supported by a Senior Faculty Summer Research Fellowship provided by the University of Nebraska Research Council.
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Flowers, J.H., Blair, B. Verbal interference with visual classification: Optimal processing and experimental design. Bull. Psychon. Soc. 7, 260–262 (1976). https://doi.org/10.3758/BF03337183
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DOI: https://doi.org/10.3758/BF03337183