ArticleScientific reports2021
Qualitative speed-accuracy tradeoff effects can be explained by a diffusion/fast-guess mixture model.
Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed.
- Assessing underlying processes of implicit weight bias: a diffusion model analysis.Scientific reports · 2026Article
- Why moral judgements change across variations of trolley-like problems.British journal of psychology (London, England : 1953) · 2026Article
- Disentangling sources of variability in decision-making.Nature reviews. Neuroscience · 2025Review
- Non-decision time: The Higgs Boson of decision.Psychological review · 2025Article
- Recognition memory decisions made with short- and long-term retrieval.Memory & cognition · 2024Article
- Bayesian confidence in optimal decisions.Psychological review · 2024Article
- A Modeling Framework to Examine Psychological Processes Underlying Ordinal Responses and Response Times of Psychometric Data.Psychometrika · 2023Article
- A spatially continuous diffusion model of visual working memory.Cognitive psychology · 2023Article
- Developmental Trajectory of Anticipation: Insights from Sequential Comparative Judgments.Behavioral sciences (Basel, Switzerland) · 2023Article
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Abstract
Rafiei and Rahnev (2021) presented an analysis of an experiment in which they manipulated speed-accuracy stress and stimulus contrast in an orientation discrimination task. They argued that the standard diffusion model could not account for the patterns of data their experiment produced. However, their experiment encouraged and produced fast guesses in the higher speed-stress conditions. These fast guesses are responses with chance accuracy and response times (RTs) less than 300 ms. We developed a simple mixture model in which fast guesses were represented by a simple normal distribution with fixed mean and standard deviation and other responses by the standard diffusion process. The model fit the whole pattern of accuracy and RTs as a function of speed/accuracy stress and stimulus contrast, including the sometimes bimodal shapes of RT distributions. In the model, speed-accuracy stress affected some model parameters while stimulus contrast affected a different one showing selective influence. Rafiei and Rahnev's failure to fit the diffusion model was the result of driving subjects to fast guess in their experiment.
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