Validation of Stop-Signal Task

The purpose of present study was to develop the Stop-Signal Task and to investigate its reliability and validity. Stop-Signal Task provides a measure of the efficiency of response inhibition deficit. Adults with ADHD tendencies and the control group completed ADHD scales(current symptoms scales, childhood symptoms scale), and impulsivity scales. Then the two groups performed the Stop-Signal Task and the Continuous Performance Test. The results were as follows. First, SSRT positively correlated with adult ADHD scores, Barratt impulsivity scores, and Dickman impulsivity scores. Second, in the case of the Stop-Signal Task, Delay and GORT of the ADHD group were shorter than delay and GORT of the control one, and SSRT of the ADHD group was longer than that of the control one. In other words, adults with ADHD tendencies have response inhibition deficit compared with the control group. In contrast, on Continuous Performance Test(CPT), there was no difference between the ADHD group and the control one. Third, alternate-form reliability of the Stop-Signal Task was significantly moderate. In conclusions, Stop-Signal Task appears to be a highly reliable and valid measure to assess the efficiency of response inhibition. Finally, clinical implication and limitations of this study were discussed, and the suggestions for future study were also discussed.

keywords: 멈춤 신호 과제, 주의력결핍 과잉행동장애, 반응 억제 결함, 멈춤 신호에 대한 반응 시간(SSRT), Stop-Signal Task, Attention Deficit Hyperactivity Disorders(ADHD), response inhibition deficit, Stop-Signal Reaction Time

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Article Contents

Vol.27 No.1

Validation of Stop-Signal Task

Abstract

Reference

Korean Journal of Psychology: General