• Title, Summary, Keyword: Odd-Ball task

Search Result 4, Processing Time 0.037 seconds

Variation of Relative Power Characteristics in EEG while Inducing Human Errors (인간과오 유발 상황에서 뇌파 상대파워 특성의 변화)

  • Lim, Hyeon-Kyo
    • Journal of the Korean Society of Safety
    • /
    • v.23 no.3
    • /
    • pp.65-70
    • /
    • 2008
  • Electroencephalogram(EEG) would be the most objective psychophysiological research technique on human errors though few research has been taken yet. This study aimed to get characteristics of human error while committing simple Odd-Ball tasks by utilizing the power spectrum technique of EEG data. Each experiment was composed of 3 tasks with different rules, and three young undergraduate students participated in this study as paid subjects. The result showed that subject and the interaction of subject and task factors were statistically significant on variation of power of $\alpha$ and $\beta$ bands which implied there would exist groups with homogeneity in their response. And though the variation of band powers due to task factors were not so great as to get statistical significance, it implied that the task requiring decoding process would be more strange to human beings than the task merely requiring psychological recall process.

Psychophysiological Symptoms of Human Errors and Work Performance (인간과오의 심리생리적 징후와 작업수행도)

  • 임현교
    • Proceedings of the Korean Institute of Industrial Safety Conference
    • /
    • /
    • pp.260-263
    • /
    • 2000
  • In order to catch the relationship between psychophysiological symptoms and human work performance, the ERP technique was adopted as a measure, and two different tasks - a counting task and an Odd-Ball task were conducted. According to the results, the P300 amplitude during the counting task was not so high as that during the Odd Ball task, and correct response corresponded with stable ERP with high P300 amplitude whereas wrong response with unstable, fluctuating ERP with low P300 amplitude, Therefore it was concluded that it would be possible to grasp the symptoms of human errors with the help of psycho-physiological technique.

  • PDF

Influence of Work Difficulty Variation on EEG Characteristics Related with Human Errors (작업난이도 변화가 인간과오 관련 뇌파 특성에 미치는 영향)

  • Lim, Hyeon-Kyo
    • Journal of the Korean Society of Safety
    • /
    • v.25 no.3
    • /
    • pp.123-130
    • /
    • 2010
  • Electroencephalogram(EEG) would be the most objective psychophysiological research technique on human errors though few research has been taken yet. This study aimed to get characteristics of human error while committing simple Odd-Ball tasks by utilizing the power spectrum technique of EEG data. Each experiment was composed of 3 tasks with different rules, and 8 young undergraduate students participated in this study as paid subjects. The result showed in the affirmative that subject and the interaction of subject and task factors were statistically significant on variation of $\alpha$ band power $P_{\alpha/(\alpha+\beta+\theta)}$ and $\beta$ band power $P_{\beta/(\alpha+\beta+\theta)}$, and that the former increasing in backward direction to Pz reflects compatibility whereas the latter increasing in forward direction to Fz reflects familiarity. Therefore it was coucluded that, since task 2 carried out in the present research requiring decoding process would be more difficult to human beings than the task merely requiring psychological recall process, task 1 and task 3 were classified into a homogenious group excluding task 2, and the ratio $\alpha$ band power to $\beta$ band power indicated enormous increase of $\alpha$ band power relative to $\beta$ band power in the cases of contra-lateral errors, especially in task 2.

Effects of Illuminating Condition on ERP and Work Performance during a Counting Task (계수작업시 사상관련전위 및 작업성능에 미치는 조명조건의 영향)

  • 임현교
    • Journal of the Korean Society of Safety
    • /
    • v.15 no.1
    • /
    • pp.167-175
    • /
    • 2000
  • Work performance and human error are complicated phenomena so that it is very difficult to grasp the true nature of them. However, Event Related Potential (ERP) may give a clue to them because human brain reflects diverse psychophysiological process. In the present study, the possibility of ERP application to the ergonomic area was evaluated in view of grasping error symptoms. For that purpose, the subjects were asked to count specific characters in a random character matrix on a computer monitor, and their ERP was compared with their performance data. Based upon the results, the amplitude of P300 was not so high as that in the case of the Odd Ball tasks, correct response corresponded with stable ERP with high P300 amplitude whereas wrong response did with unstable, fluctuating ERP with low P300 amplitude. Those results coincided with the work performance, and it was concluded that 3-wave fluorescent with illumination level of 800 lux would be recommendable for the counting task in concern. Conclusively, ERP including P300 might supply an objective clue to the problem of human errors in cognitive process.

  • PDF