ArticlePsychological research2020
Are model parameters linked to processing stages? An empirical investigation for the ex-Gaussian, ex-Wald, and EZ diffusion models.
Article in Psychological research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.
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Who cites it
11 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Differences in Ex-Gaussian Parameters from Response Time Distributions Between Individuals with and Without Attention Deficit/Hyperactivity Disorder: A Meta-analysis.Neuropsychology review · 2024Pooled it
- How do my distributions differ? significance testing for the overlapping index using permutation tests.Psychonomic bulletin & review · 2026Article
- The association between cardiovascular fitness and sustained attention in the elderly-a diffusion decision model approach.Frontiers in psychology · 2026Article
- Capturing trial-by-trial variability in behaviour: people with Parkinson's disease exhibit a greater rate of short-term fluctuations in response times.Translational psychiatry · 2025Article
- A sequential model of two-choice intensity identification.Frontiers in cognition · 2025Article
- Estimating the proportions and latencies of reaction time outliers: A pooling method and case study of lexical decision tasks.Behavior research methods · 2024Article
- Sequential Effects on Reaction Time Distributions: Commonalities and Differences Across Paradigms.Journal of cognition · 2024Article
- Distraction by unexpected sounds: comparing response repetition and response switching.Frontiers in psychology · 2024Article
- Longitudinal developmental trajectories of inhibition and white-matter maturation of the fronto-basal-ganglia circuits.Developmental cognitive neuroscience · 2022Article
- Delta plots for conflict tasks: An activation-suppression race model.Psychonomic bulletin & review · 2021Review
- Comparison of Different Response Time Outlier Exclusion Methods: A Simulation Study.Frontiers in psychology · 2021Article
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Authors and funding
2 authors.
Funding
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Abstract
In previous research, the parameters of the ex-Gaussian distribution have been subject to a wide variety of interpretations. The present study investigated whether the ex-Gaussian model is capable of distinguishing effects on separate processing stages (i.e., pre-motor vs. motor). In order to do so, we used datasets where the locus of effect was quite clear. Specifically, we analyzed data from experiments comparing hand vs. foot responses-presumably differing in the motor stage-and from experiments in which the lateralized readiness potential was used to localize experimental effects into premotor vs. motor processes. Moreover, we broadened the scope to two other descriptive RT models: the ex-Wald and EZ diffusion models. To the extent possible with each of these models, we reanalyzed the RT data of 19 clearly localized experimental effects from 12 separate experiments reported in seven previously published articles. Unfortunately, we did not find a clear pattern of results for any of the models, with no clear link between effects on one of the model's parameters and effects on different processing stages. The present results suggest that one should resist the temptation to associate specific processing stages with individual parameters of the ex-Gaussian, ex-Wald, and EZ diffusion models.
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