Hardt J V, Kamiya J
Biofeedback Self Regul. 1976 Mar;1(1):63-75. doi: 10.1007/BF00998691.
Success or failure of EEG feedback training for alpha enhancement can depend on how alpha activity is quantified and fed back. Alpha-enhancement failures usually employ a percent time (%) technique; successes typically use amplitude integration (variation of). To dramatize the differences between percent and integration techniques, we derived both measures simultaneously from left occipital (O1) and left central (C3) sites for 16 male subjects who were given 5.6 hours of integrated alpha feedback from the midline occipital (Ozeta) site. At both the O1 and C3 sites the integrated and percent measures were not equivalent and not linearly related. Statistically significant differences in the (integrated, percent) correlation coefficients (z-transpormed) were observed under the different recording conditions: alpha enhancement, alpha suppression, and baselines. Theoretical discussion of integration and percent techniques is given and the adoption of amplitude integration measures and feedback stimuli is strongly advocated.
脑电图反馈训练增强阿尔法波的成败可能取决于阿尔法波活动如何被量化和反馈。阿尔法波增强失败通常采用时间百分比（%）技术；成功的案例通常使用振幅积分（的变体）。为了突出百分比技术和积分技术之间的差异，我们同时从16名男性受试者的左枕叶（O1）和左中央（C3）部位获取了这两种测量数据，这些受试者从中线枕叶（Ozeta）部位接受了5.6小时的整合阿尔法波反馈。在O1和C3部位，积分测量和百分比测量既不相等也不存在线性关系。在不同的记录条件下，即阿尔法波增强、阿尔法波抑制和基线条件下，观察到（积分、百分比）相关系数（z变换）存在统计学显著差异。文中给出了对积分技术和百分比技术的理论探讨，并强烈主张采用振幅积分测量和反馈刺激。
