Alpha Neurofeedback Has a Positive Effect for Participants Who Are Unable to Sustain Their Alpha Activity.

Interestingly, we found a negative trend between change in power and how much participants paid attention to the feedback tone (slope = –0.130 ± 0.076, t (23) = –1.703, p = 0.103; Fig. 4 A ); the results failed to reach significance only because of one outlier participant who completely ignored the tone; removing this participant from analysis yielded a slope of –0.261 ± 0.086, t (22) = –3.036, p = 0.006) suggesting that participants who were actively attending to the feedback tone did not benefit from neurofeedback.

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4 A ); the results failed to reach significance only because of one outlier participant who completely ignored the tone; removing this participant from analysis yielded a slope of –0.261 ± 0.086, t (22) = –3.036, p = 0.006) suggesting that participants who were actively attending to the feedback tone did not benefit from neurofeedback.

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A closer look at Figure 2 revealed an interesting trend for the participants who showed a significant effect: for most of these participants, alpha power appeared to decrease over time, suggesting that these participants could not sustain their alpha rhythm.

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