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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Vydané v:	Psychological science Ročník 24; číslo 3; s. 352 - 362
Hlavní autori:	Verbruggen, Frederick, Chambers, Christopher D., Logan, Gordon D.
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Los Angeles, CA SAGE Publications 01.03.2013 Sage Publications SAGE PUBLICATIONS, INC
Predmet:	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.
Bibliografia:	SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14 ObjectType-Article-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2
ISSN:	0956-7976 1467-9280 1467-9280
DOI:	10.1177/0956797612457390