Abedanzadeh Rasool, Alboghebish Saeed, Barati Parisa
Department of Motor Behaviour, Faculty of Sport Sciences, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
Psicol Reflex Crit. 2021 Oct 9;34(1):30. doi: 10.1186/s41155-021-00195-8.
When it comes to simultaneous processing of two tasks, information processing capacity is usually below par and not desirable. Therefore, this preliminary study aimed to investigate the effect of transcranial direct-current stimulation (tDCS) of dorsolateral prefrontal cortex (DLPFC) on performing dual tasks. Twenty-six students (average age 25.2 ± 2.43 years) were selected and then randomly divided into experimental and sham groups. All of the participants conducted the Stroop effect test in a dual task situation before and after the tDCS. This test included two intervals between the stimuli of 100 and 900 ms. The results of mixed-ANOVA showed that the average second reaction time of the experimental stimulated group was reduced (in both dual tasks with congruent and incongruent stimuli) significantly after the tDCS. Therefore, it can be stated that the tDCS of the DLPFC increases the information processing speed and the capacity of attention and, as a result, decreases the effect of the psychological refractory period.
在同时处理两项任务时，信息处理能力通常低于正常水平且不尽人意。因此，这项初步研究旨在探讨经颅直流电刺激（tDCS）背外侧前额叶皮层（DLPFC）对执行双重任务的影响。选取了26名学生（平均年龄25.2±2.43岁），然后随机分为实验组和假刺激组。所有参与者在tDCS前后的双重任务情境中进行了斯特鲁普效应测试。该测试在刺激之间包括两个100毫秒和900毫秒的间隔。混合方差分析结果表明，经tDCS后，实验刺激组的平均第二次反应时间显著缩短（在刺激一致和不一致的双重任务中均如此）。因此，可以说DLPFC的tDCS提高了信息处理速度和注意力容量，从而降低了心理不应期的影响。
