Comparison of Stop-Signal and Continuous Movement Reaction Stop Times to Measure Inhibitory Control
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Date
2020
Authors
Denning, Dominique
Kelsey, Schultz
Nicole, Swann
Journal Title
Journal ISSN
Volume Title
Publisher
University of Oregon
Abstract
For the past few decades, a major tool used to study inhibitory control has been the Stop-Signal Task (SST). This task gives an estimate of how well individuals can inhibit initiated movements. The speed of stopping can be estimated as the stop-signal reaction time, or SSRT. This task has proven useful, but there are limitations. For example, SSRT can only be estimated overall and not at the individual trial level. Additionally, the standard stop task involves stopping a planned movement, rather than stopping a movement which is already ongoing. To address these limitations, we have developed a new continuous movement stop task (CMST). This task directly measures the termination of an ongoing movement, allowing measurement of stopping speed at the individual trial level. It is currently unknown how stopping measures with this new task relates to SSRT measured with the conventional stop signal task. Our research addresses this question. Thirty participants will complete both the standard stopping task and our new continuous movement stopping task. We will compare stopping speed derived from our novel task to conventional SSRTs estimated by the standard stop task. The results of our study will help us better understand the relationship between the two tasks and also help establish the generalizability of inhibitory control.
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Keywords
Inhibitory Control, Neuroscience