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- Title
Increased Intra-Individual Variability as a Marker of Executive Dysfunction in Generalized Anxiety Disorder.
- Authors
Yu, Yongju; Xu, Haiyan; Xu, Yuanyuan; Lu, Fang; Li, Min
- Abstract
Recent studies suggest that individual difference in intra-individual variability (IIV) of reaction times is an important indicator of attentional executive control. However, there are few existing studies on the executive control of high trait-anxious individuals assessed by using reaction time variability. This study assessed whether executive functions are impaired among clinical and non-clinical trait-anxious individuals indicated by IIV. The cross-reliability and discriminative power of three IIV parameters (raw intra-individual standard deviation, SD; reaction time coefficient of variation, RTCV; and mean absolute deviation, MAD) were compared. Twenty-five non-clinical individuals with low trait anxiety (LTA), 31 non-clinical individuals with high trait anxiety (HTA), and 19 clinical patients diagnosed with generalized anxiety disorder (GAD) finished self-reported measures, an emotional spatial-cuing task, and a non-emotional arrow flanker task. In the emotional task, GAD patients had significantly slower response speed, lower accuracy, and greater IIV parameters than the LTA and HTA groups. In the non-emotional task, the GAD group exhibited poorer processing efficiency, greater SD and RTCV, and intact performance effectiveness. RTCV is suggested to be a better marker of executive dysfunction than SD and MAD due to its good discriminative power and reliability as well as less affected by reaction times.
- Subjects
GENERALIZED anxiety disorder; CONTROL (Psychology); EXECUTIVE function; VARIABILITY (Psychometrics); ATTENTION control; STANDARD deviations
- Publication
Frontiers in Psychiatry, 2022, Vol 13, p1
- ISSN
1664-0640
- Publication type
Article
- DOI
10.3389/fpsyt.2022.532778