Table 4.
Final model for the prediction of EEG-NF success for the transfer task without immediate feedback by the strategies.
| B | SE | 95% CI | t | p | df | Sum/Mean Sq | F ratio | |
|---|---|---|---|---|---|---|---|---|
| Fixed Effects | ||||||||
| Intercept | 0.17 | 0.12 | [−0.07, 0.41] | 1.38 | 0.175 | |||
| Behavior | 0.08 | 0.07 | [−0.05, 0.22] | 1.16 | 0.247 | F (1, 1160) | 0.87 | 1.34 |
| Concentration | −0.01 | 0.09 | [−0.19, 0.17] | −0.12 | 0.906 | F (1, 1091) | 0.00 | 0.02 |
| Distraction | −0.09 | 0.09 | [−0.26, 0.09] | −1.00 | 0.316 | F (1, 727) | 0.65 | 1.01 |
| Emotion | −0.21 | 0.08 | [−0.37, −0.04] | −2.56 | 0.011 | F (1, 915) | 4.25 | 6.55 |
| Imagination | −0.08 | 0.07 | [−0.22, 0.06] | −1.12 | 0.264 | F (1, 1121) | 0.80 | 1.25 |
| Self-Talk | −0.05 | 0.11 | [−0.27, −0.18] | −0.42 | 0.676 | F (1, 1124) | 0.11 | 0.17 |
| Thought | 0.21 | 0.07 | [0.07, 0.36] | 2.87 | 0.004 | F (1, 1145) | 5.34 | 8.24 |
| Random effects | Variance | SD |
|---|---|---|
| Participant (intercept) | 0.17 | 0.41 |
| Session (intercept) | 0.02 | 0.14 |
| Model fit | ||
|---|---|---|
| R 2 | Marginal | Conditional |
| 0.04 | 0.25 | |
EEG, electroencephalography; NF, neurofeedback. p-values for fixed effects calculated using Satterthwaite’s approximations. Confidence intervals have been calculated using the Wald method. All strategies were dummy-coded (0 = Strategy was not applied in the respective session, 1 = Strategy was applied in the respective session). Model equation: Transfer difference value in baseline versus regulation ~ Concentration + Imagination + Self-Talk + Distraction + Thought + Emotion + Behavior + (1 | participant) + (1 | session). Due to its rare occurrence, the category “No Strategy” was not included in the analyses.