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Frequency-dependent Reproducibility of Low Frequency Fluctuation of reaction time over time and across Tasks

Frequency-dependent Reproducibility of Low Frequency Fluctua...

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第十九届全国心理学学术会议

作者： Zan-Zan Liu Hui-Jie Qu Zhuo-Ling Tian Meng-Jian Han Yi Fan Lie-Zhong Ge Yu-Feng Zang Hang Zhang Institutes of Psychology Zhejiang Sci-tech University Institutes of Psychological Sciences Hangzhou Normal University Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments Center for Cognition and Brain Disorders Hangzhou Normal University Institutes of Physics Zhejiang Sci-tech University Paul C.Lauterbur Research Centers for Biomedical Imaging Shenzhen Institutes of Advanced TechnologyChinese Academy of Sciences

Increased reaction time variability(RTV) is a characteristic of sustained attention *** amplitude of low frequency fluctuation(ALFF) of RT has been used to assess frequency-dependent RTV in studies of sustained attention ***,the test-retest reliability of RT-ALFF remains *** present study aims to assess this issue by examining the frequency-dependent reproducibility of RT-ALFF over time and across different *** seven healthy college students(20.7 ±2.1 years,18 females) participated in a behavioral experiment twice,with a mean interval of 56 days(ranged from 54 to 58 days).In each visit,two tasks,i.e.,Eriksen flanker task(EFT) and simple reaction task(SRT) were *** order of the two tasks was counter-balanced across all *** employed an arrow version of EFT,in which trials were presented continuously with a fixed 3-s inter-trial interval(ITI)in order to enable frequency-dependent *** were instructed to judge the direction(left or right) of the central arrow and press corresponding key "F" or "J" of the computer keyboard with the index fingers in the computer keyboard as accurately and quickly as *** also employed a fixed ITI(3-s) for the *** were instructed to press the key "J" with their right index finger of the right hand when target *** and anticipatory responses(RT ≤100 ms) were interpolated by linear interpolation to re-construct an integrated time ***,RT time series of EFT and SRT for each visit were standardized via dividing mean RT,removed of the linear trend and converted into frequency ***,RT-ALFF was calculated in the whole frequency band(0-0.167 Hz) and a few sub-frequency bands including Slow-6(< 0.01 Hz),Slow-5(0.01-0.027 Hz),Slow-4(0.027-0.073 Hz),and Slow-3(0.073-0.167 Hz).In each frequency band,the test-retest reliability of RT-ALFF for EFT and SRT,respectively,was evaluated through intra-class correlation(ICC) betwee

关键词： reaction time variability Amplitude of low frequency fluctuation Test-retest reliability Reproducibility

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