Min Yoon-Ki, Chung Soon-Cheol, Min Byung-Chan
Department of Psychology, Chungnam National University, Korea.
Appl Psychophysiol Biofeedback. 2005 Jun;30(2):137-50. doi: 10.1007/s10484-005-4310-0.
In this study, emotional changes were induced by four imaginations--pleasantness, unpleasantness, arousal, and relaxation. They were induced using situations or pictures, as stimuli for imagination, selected on the basis of subjective evaluation and were examined by analyses of the physiological signals of the central and autonomic nervous systems whether the intended emotions were appropriately achieved, and whether these emotional changes could be distinguished from the analysis of physiological signals. While participants were asked to recall each situation (for experiment 1--free recall) or picture (experiment 2--forced recall) of the four imaginations, Electroencephalogram (EEG) in the area of Fz and Cz, Electrocardiogram (ECG), Galvanic Skin Response (GSR), Skin Temperature (SKT), and Respiration (RSP) were measured. The analysis of the EEG revealed that three emotional states were classified by values of alpha/(alpha + beta) and beta/(alpha + beta) and the autonomic nervous system responses, particularly the average interval of R-R and RSP. The results suggest that the values of alpha/(alpha + beta) or beta/(alpha + beta) in the areas of Fz and Cz and the average interval of R-R and/or RSP can be reliable parameters to measure some of the emotional states.
在本研究中，通过四种想象诱发情绪变化——愉悦、不悦、唤起和放松。使用基于主观评价选择的情境或图片作为想象的刺激物来诱发这些情绪变化，并通过分析中枢和自主神经系统的生理信号来检查预期情绪是否得到适当实现，以及这些情绪变化是否可以从生理信号分析中区分出来。当要求参与者回忆四种想象中的每种情境（实验1——自由回忆）或图片（实验2——强制回忆）时，测量Fz和Cz区域的脑电图（EEG）、心电图（ECG）、皮肤电反应（GSR）、皮肤温度（SKT）和呼吸（RSP）。脑电图分析表明，三种情绪状态可通过α/（α+β）和β/（α+β）的值以及自主神经系统反应，特别是R-R和RSP的平均间隔进行分类。结果表明，Fz和Cz区域的α/（α+β）或β/（α+β）值以及R-R和/或RSP的平均间隔可以作为测量某些情绪状态的可靠参数。
