Fictitious Inhibitory Differences: How Skewness and Slowing Distort the Estimation of Stopping Latencies

The stop-signal paradigm is a popular method for examining response inhibition and impulse control in psychology, cognitive neuroscience, and clinical domains because it allows the estimation of the covert latency of the stop process: the stop-signal reaction time (SSRT). In three sets of simulation...

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Vydáno v:Psychological science Ročník 24; číslo 3; s. 352 - 362
Hlavní autoři: Verbruggen, Frederick, Chambers, Christopher D., Logan, Gordon D.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Los Angeles, CA SAGE Publications 01.03.2013
Sage Publications
SAGE PUBLICATIONS, INC
Témata:
Activity levels. Psychomotricity
Bias
Biological and medical sciences
Child psychology
Cognition
Cognition & reasoning
Cognitive psychology
Computer Simulation - statistics & numerical data
Covert
Developmental psychology
Distribution
Estimating techniques
Estimation
Estimation bias
Estimation methods
Experimentation
Fictitious
Fundamental and applied biological sciences. Psychology
Humans
Inhibition, Psychological
Integration
Latency
Models, Psychological
Neuroscience
Neurosciences
Psychological inhibition
Psychology
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Psychomotor Performance - physiology
Reaction time
Reaction Time - physiology
Response inhibition
Signals
Simulations
Skewness
Social integration
Social psychology
Social theory
task analysis
reaction time
response inhibition
Human
Distribution
Reaction time
Cognition
Inhibition
Simulation model
ISSN:0956-7976, 1467-9280, 1467-9280
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Popis
Shrnutí:The stop-signal paradigm is a popular method for examining response inhibition and impulse control in psychology, cognitive neuroscience, and clinical domains because it allows the estimation of the covert latency of the stop process: the stop-signal reaction time (SSRT). In three sets of simulations, we examined to what extent SSRTs that were estimated with the popular mean and integration methods were influenced by the skew of the reaction time distribution and the gradual slowing of the response latencies. We found that the mean method consistently overestimated SSRT. The integration method tended to underestimate SSRT when response latencies gradually increased. This underestimation bias was absent when SSRTs were estimated with the integration method for smaller blocks of trials. Thus, skewing and response slowing can lead to spurious inhibitory differences. We recommend that the mean method of estimating SSRT be abandoned in favor of the integration method.
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ISSN:0956-7976
1467-9280
1467-9280
DOI:10.1177/0956797612457390