本研究徵求16 位健康的受測者以腦波頻譜分析及事件關聯電位來探討視覺反應作業及人員可靠度之相關性，人員可靠度以個人之反應準確度區分為高、低可靠度組，每一組8 人，實驗受測者進行修正之Eriksen 旁側夾擊作業前，先量測其在休息狀態之5 分鐘腦波活動，將腦波去除雜訊計算各個頻帶之分佈，並檢視Eriksen 旁側夾擊作業誘發腦波事件關聯電位之振幅及潛時，研究結果顯示低可靠度組在額葉部位有較高之α頻帶腦波能量及在頂葉中心有較低振幅與較長潛時之事件關聯電位P300 成分波，此研究發現在額葉部位有較高之α頻帶腦波能量及在頂葉中心有較低振幅與較長潛時之事件關聯電位P300 成分波之健康受測者在視覺反應作業有較低之人員可靠度之特徵，此結果說明α頻帶腦波能量及腦波事件關聯電位P300 成分波之振幅與潛時可用以反映視覺作業之人員可靠度。 Electrophysiological correlates of human reliability in visual response tasks were investigated in sixteen healthy subjects by using electroencephalographic spectral power and event-related potentials (ERP). Human reliability was first determined by calculating individual reaction accuracy for splitting the entire group into high reliability (HR) and low reliability (LR) subgroups, each with eight subjects. The electroencephalography (EEG) activities of testing subjects were measured at rest condition for 5-min during a modified Eriksen flanker task. Artifact-free EEG segments were used to compute the distribution of EEG at varied frequency bands as well as to detect peak and latency of ERPs of a flanker task. Our results showed that subjects with LR exhibited higher alpha band EEG power at frontal recording site. Additionally, the LR group revealed lower P300 amplitude and predominantly longer P300 latency at centro-parietal recording site than those of the HR group. These findings implied that higher alpha band EEG power at frontal and smaller amplitude, longer latency P300 component of ERP measures at centro-parietal might reveal a trait of lower reliability in healthy controls during visual response tasks. Our study could demonstrate that alpha band EEG power and P300 component of ERP measures from the modified Eriksen flanker task are well suited to reflect human reliability for healthy subjects for visual tasks.
