Severe violations of independence in response inhibition tasks are pervasive and consequential
Patrick G. Bissett, Russell A. Poldrack, and Gordon D. Logan
Received Date 3rd April 19
The stop-signal paradigm, a primary experimental paradigm for understanding cognitive control and response inhibition, rests upon the theoretical foundation of race models, which assume that a go process races independently against a stop process that occur after a stop-signal delay (SSD). We show that severe violations of this independence assumption at short SSDs occur systematically across a wide range of conditions, including fast and slow RTs, auditory and visual stop signals, manual and saccadic responses, and especially in selective stopping. We also reanalyze basic and clinical data and show that fundamental conclusions can change when short SSDs are excluded. Finally, we suggest experimental and analysis techniques to address this violation, and propose adjustments to extant models to accommodate this finding.
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This is an abstract of a preprint hosted on an independent third party site. It has not been peer reviewed but is currently under consideration at Nature Communications.