Alpha detection: some comments on Hardt and Kamiya, "Conflicting results in EEG alpha feedback studies". |
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Authors: | P Lansky Z Bohdanecky M Indra T Radil-Weiss |
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Abstract: | The problem of defining EEG alpha activity, and of detecting and measuring it, is outlined. Some advantages of a threshold method are presented and compared with an amplitude-integration method. Characteristics of percent-time scoring, based upon observable alpha spindles in the waking EEG, are discussed. A probability distribution of percent-time alpha as a function of detection threshold is derived and compared with empirical data. |
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