The semantic Stroop effect: An ex-Gaussian analysis

Psychonomic Bulletin & Review
Darcy WhiteDerek Besner

Abstract

Previous analyses of the standard Stroop effect (which typically uses color words that form part of the response set) have documented effects on mean reaction times in hundreds of experiments in the literature. Less well known is the fact that ex-Gaussian analyses reveal that such effects are seen in (a) the mean of the normal distribution (mu), as well as in (b) the standard deviation of the normal distribution (sigma) and (c) the tail (tau). No ex-Gaussian analysis exists in the literature with respect to the semantically based Stroop effect (which contrasts incongruent color-associated words with, e.g., neutral controls). In the present experiments, we investigated whether the semantically based Stroop effect is also seen in the three ex-Gaussian parameters. Replicating previous reports, color naming was slower when the color was carried by an irrelevant (but incongruent) color-associated word (e.g., sky, tomato) than when the control items consisted of neutral words (e.g., keg, palace) in each of four experiments. An ex-Gaussian analysis revealed that this semantically based Stroop effect was restricted to the arithmetic mean and mu; no semantic Stroop effect was observed in tau. These data are consistent with the views (1)...Continue Reading

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Citations

Nov 22, 2017·Memory & Cognition·Chunming Luo, Robert W Proctor
Jan 27, 2018·Psychonomic Bulletin & Review·Maria AugustinovaLudovic Ferrand
May 3, 2018·The Quarterly Journal of Experimental Psychology : QJEP·Aurélia BugaiskaPatrick Bonin
May 16, 2018·Psychological Research·Chunming Luo, Robert W Proctor
Jun 25, 2021·The Quarterly Journal of Experimental Psychology : QJEP·Simone SulpizioMichele Scaltritti
Jul 31, 2021·Psychonomic Bulletin & Review·Jeff Miller, Wolf Schwarz

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