著者

大久保 瞳 高井 秀明 坂部 崇政 楠本 恭久

出版者

一般社団法人 日本体育・スポーツ・健康学会

雑誌

体育学研究 (ISSN:04846710)

巻号頁・発行日

vol.60, no.1, pp.209-221, 2015 (Released:2015-06-13)

参考文献数

40

被引用文献数

3 3

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The purpose of this study was to examine the effects of time pressure (TP) on the speed of stimulus evaluation and processing resources, and speed and accuracy of the behavioral response, using P300. The participants were 13 physical education students (mean age 18.85 years, SD 0.95), who were presented with a flanker task involving spacing between letters. Under non-TP conditions, there was no feedback sound even if there was no reaction before the stimulus was replaced by a new stimulus. The TP condition was a feedback sound that was triggered if no reaction occurred within 350 ms. The results showed that in terms of behavioral parameters, the reaction time became shorter with increasing TP. In addition, response accuracy decreased with increasing TP. Among physiological indices, P300 latency at Pz was shorter and P300 amplitude at Pz was larger under TP conditions than under non-TP conditions. Our results suggest that TP shortens the process of stimulus evaluation, and that more processing resources are required under TP conditions.

著者

坂部 崇政 高井 秀明 大久保 瞳

出版者

日本スポーツ心理学会

雑誌

スポーツ心理学研究 (ISSN:03887014)

巻号頁・発行日

pp.2022-2007, (Released:2022-06-07)

参考文献数

42

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This study aimed to measure karate playersʼ contingent negative variation (CNV) and P3 and to evaluate their information processing when predicting a temporally shielded punch. Based on their experience of karate competition, participants were divided into two groups: an expert group of 11 people belonging to the A university karate club and a novice group of 13 people without karate competition experience. This study employed a choice reaction task and used the karate videos as stimuli. Participants were told to press a button with their right hand if the video showed an upper punch and with their left hand if it showed a middle punch. The measurement indices were the visual analogue scale (VAS) score for task difficulty, correct answer rate, reaction time, CNV, and P3. The results showed that the reaction time of the expert group was significantly shorter than that of the novice group. Similarly, the P3 latency of the expert group was significantly shorter than that of the novice group, indicating that the expert group was quicker to evaluate the stimulus during the prediction of the punch. Nevertheless, there was no significant difference in CNV amplitude and P3 amplitude between the expert and novice groups, indicating that the same level of cognitive processing took place between the expert and novice groups during the video presentation. This suggests that the expert group is able to perform better at a certain level of brain activity. Therefore, it is clear that the expert group in this study is able to respond quickly by appropriately adjusting their brain activity in the cognitive and motor preparation stages during the prediction of the punch.