Table 3.
Final model for the prediction of EEG-NF success for the regulation task with immediate feedback by the strategies.
| B | SE | 95% CI | t | p | df | Sum/Mean Sq | F ratio | |
|---|---|---|---|---|---|---|---|---|
| Fixed effects | ||||||||
| Intercept | 0.14 | 0.15 | [−0.15, 0.43] | 0.96 | 0.342 | |||
| Behavior | 0.17 | 0.05 | [0.07, 0.27] | 3.46 | 0.001 | F (1, 2383) | 7.80 | 11.99 |
| Concentration | 0.13 | 0.07 | [−0.02, −0.25] | 1.70 | 0.090 | F (1, 2431) | 1.86 | 2.87 |
| Distraction | −0.01 | 0.06 | [−0.13, 0.12] | −0.07 | 0.944 | F (1, 2185) | 0.00 | 0.01 |
| Emotion | −0.15 | 0.06 | [−0.26, −0.03] | −2.40 | 0.017 | F (1, 2410) | 3.74 | 5.75 |
| Imagination | 0.13 | 0.05 | [0.03, −0.23] | 2.51 | 0.012 | F (1, 2393) | 4.08 | 6.28 |
| Self-Talk | −0.68 | 0.08 | [−0.85, −0.52] | −8.33 | <0.001 | F (1, 2412) | 45.17 | 69.45 |
| Thought | 0.02 | 0.05 | [−0.09, 0.12] | 0.29 | 0.773 | F (1, 2420) | 0.05 | 0.08 |
| Random effects | Variance | SD |
|---|---|---|
| Participant (intercept) | 0.40 | 0.64 |
| Session (intercept) | 0.01 | 0.10 |
| Model fit | ||
|---|---|---|
| R 2 | Marginal | Conditional |
| 0.05 | 0.42 | |
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: Neurofeedback 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.