The trial-by-trial fluctuations in primary motor cortex excitability during attentional bias among smokers: A transcranial magnetic stimulation study

IF 5.3 1区 心理学 Q1 PSYCHOLOGY, CLINICAL
Xue Xia , Dandan Wang , Yansong Li , Xiaoyun Zhu , Xiaoying Tan , Yin Wu
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引用次数: 0

Abstract

Background

A relatively new computational approach called trial-level bias score (TL-BS) has shown that attentional bias to smoking-related stimuli in smokers fluctuates temporally, trial by trial, during attention tasks. Here, we investigated the reliability of using TL-BS values to assess attentional bias and the electrophysiology mechanisms undergirding fluctuations in attentional bias among smokers.

Method

In total, 26 male smokers and 26 male non-smokers performed a dot-probe task in Experiment 1. In Experiment 2, an additional 23 male smokers and 23 male non-smokers performed the same task while undergoing single-pulse transcranial magnetic stimulation, which was used to investigate corticospinal excitability.

Results

It showed that assessing TL-BS parameters for reaction time (RT) was more reliable than calculating the traditional mean attentional bias score; however, this superior reliability was no longer apparent after controlling for general RT variability. There was a significant difference between smokers and non-smokers in TL-BS parameters calculated for both RT and motor-evoked potential (MEP) amplitude. However, TL-BS parameters for RT and MEP amplitude were strongly correlated with general RT variability and general MEP variability, respectively.

Conclusions

Our findings indicated that TL-BS parameters may not be ideal for measuring attentional bias at either the behavioral or electrophysiology level; however, larger general RT and MEP amplitude variabilities in non-smokers may indicate dysregulation of cognitive processing in smokers.

吸烟者注意偏差时初级运动皮层兴奋性的逐次波动:经颅磁刺激研究
背景一种名为 "试验水平偏差评分"(trial-level bias score,TL-BS)的相对较新的计算方法表明,在注意力任务中,吸烟者对吸烟相关刺激的注意偏差会随着时间的推移而逐次波动。在此,我们研究了使用 TL-BS 值评估注意偏差的可靠性,以及吸烟者注意偏差波动的电生理机制。方法在实验 1 中,共有 26 名男性吸烟者和 26 名男性非吸烟者执行了点探测任务。结果表明,评估反应时间(RT)的TL-BS参数比计算传统的平均注意偏差得分更可靠;但是,在控制了一般RT变异性后,这种优越的可靠性不再明显。在计算反应时间和运动诱发电位(MEP)振幅的 TL-BS 参数时,吸烟者和非吸烟者之间存在明显差异。结论我们的研究结果表明,TL-BS 参数可能不是在行为学或电生理学水平上测量注意偏差的理想方法;但是,非吸烟者较大的一般 RT 和 MEP 振幅变异性可能表明吸烟者的认知加工失调。
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来源期刊
CiteScore
10.70
自引率
5.70%
发文量
38
审稿时长
33 days
期刊介绍: The International Journal of Clinical and Health Psychology is dedicated to publishing manuscripts with a strong emphasis on both basic and applied research, encompassing experimental, clinical, and theoretical contributions that advance the fields of Clinical and Health Psychology. With a focus on four core domains—clinical psychology and psychotherapy, psychopathology, health psychology, and clinical neurosciences—the IJCHP seeks to provide a comprehensive platform for scholarly discourse and innovation. The journal accepts Original Articles (empirical studies) and Review Articles. Manuscripts submitted to IJCHP should be original and not previously published or under consideration elsewhere. All signing authors must unanimously agree on the submitted version of the manuscript. By submitting their work, authors agree to transfer their copyrights to the Journal for the duration of the editorial process.
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