Fictitious Inhibitory Differences

• DOI: 10.1177/0956797612457390
• Publication Date: 2013-02-12T03:25:53Z
• Authors: Frederick Verbruggen; Christopher D. Ch...; Gordon D. Logan
• Keywords: Spurious relationship; Covert; Response inhibition; Stop signal

The stop-signal paradigm is a popular method for examining response inhibition and impulse control in psychology, cognitive neuroscience, clinical domains because it allows the estimation of covert latency stop process: reaction time (SSRT). In three sets simulations, we examined to what extent SSRTs that were estimated with mean integration methods influenced by skew distribution gradual slowing latencies. We found consistently overestimated SSRT. tended underestimate SSRT when latencies gradually increased. This underestimation bias was absent smaller blocks trials. Thus, skewing can lead spurious inhibitory differences. recommend estimating be abandoned favor method.