Table 3.
Relative EEG band power in % in eyes-open, eyes-closed, and during food presentation at pre- and posttreatment
| Variable | Food-specific neurofeedback M (SD) |
General neurofeedback M (SD) |
Time | Group | Time × group | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pretreatment | Posttreatment | Pretreatment | Posttreatment | df | F | ηp2 | df | F | ηp2 | df | F | ηp2 | |
| Eyes-closed | n = 12 | n = 12 | n = 18 | n = 18 | |||||||||
| Alpha | 32.18 (16.43) | 32.92 (17.92) | 30.29 (9.53) | 31.24 (10.48) | 1, 28 | 0.12 | .00 | 1, 28 | 0.03 | .00 | 1, 28 | 0.01 | .00 |
| Beta | 25.21 (11.37) | 4.78 (3.40) | 25.54 (7.30) | 3.99 (0.98) | 1, 28 | 849.21** | .97 | 1, 28 | 0.05 | .00 | 1, 28 | 0.28 | .01 |
| Theta | 15.17 (4.66) | 16.17 (5.30) | 16.19 (4.02) | 18.18 (4.73) | 1, 28 | 4.46* | .14 | 1, 28 | 1.14 | .04 | 1, 28 | 0.40 | .01 |
| Eyes-open | n = 13 | n = 13 | n = 18 | n = 18 | |||||||||
| Alpha | 22.82 (10.70) | 26.69 (12.19) | 19.29 (6.95) | 20.40 (6.82) | 1, 29 | 15.43** | .35 | 1, 29 | 1.17 | .04 | 1, 29 | 2.76 | .09 |
| Eyes-open | n = 13 | n = 13 | n = 18 | n = 18 | |||||||||
| Beta | 28.92 (11.10) | 5.87 (3.95) | 27.84 (7.52) | 5.51 (1.15) | 1, 29 | 646.62** | .96 | 1, 29 | 0.09 | .00 | 1, 29 | 0.46 | .02 |
| Theta | 18.14 (3.99) | 17.15 (3.61) | 18.77 (4.56) | 19.18 (3.73) | 1, 29 | 0.29 | .01 | 1, 29 | 1.07 | .31 | 1, 29 | 2.92 | .09 |
| Food presentation | n = 11 | n = 11 | n = 18 | n = 18 | |||||||||
| Alpha | 17.48 (7.68) | 18.80 (7.35) | 17.25 (5.69) | 17.66 (4.79) | 1, 27 | 4.24* | .14 | 1, 27 | 0.00 | .00 | 1, 27 | 0.74 | .03 |
| Beta | 31.68 (10.59) | 6.97 (4.49) | 27.48 (6.24) | 5.75 (1.21) | 1, 27 | 707.86** | .96 | 1, 27 | 0.96 | .03 | 1, 27 | 0.06 | .00 |
| Theta | 17.99 (4.45) | 18.24 (4.18) | 18.02 (4.47) | 18.96 (3.60) | 1, 27 | 2.23 | .08 | 1, 27 | 0.10 | .00 | 1, 27 | 0.60 | .02 |
N differs because only EEG datasets with > 30 sequences were analyzed. Alpha = 8–12 Hz, beta = 13–30 Hz, theta = 4–7 Hz
*p < .05; **p < .01