Table 2. Results of mixed effects models: Change in affect from pre to post-assessment.
| Variable | Positive affect | Negative affect |
|---|---|---|
| b (SE); [CI] | b (CI); [CI] | |
| Group a | ||
| Pseudo-exp. | 0.17 (0.22);[-0.26, 0.59] | -0.07 (0.24); [-0.54, 0.39] |
| Exp. | 0.21 (0.22); [-0.23, 0.64] | -0.02 (0.24); [-0.49, 0.45] |
| Time b | 0.15 (0.16); [-0.16, 0.46] | 0.19 (0.12); [-0.04, 0.43] |
| Group*Time | ||
| Pseudo-exp./post assessment | -0.01 (0.21); [-0.43, 0.41] | -0.41 (0.16); [-0.73, -0.09] c |
| Exp./post-assessment | -0.11 (0.22); [-0.55, 0.33] | -0.23 (0.17); [-0.56, 0.10] |
| Estimation (SE) | Estimation (SE) | |
| Random Effects | ||
| Intercept SD (Participant) | 0.89 (0.06); [0.77, 1.03] | 0.97 (0.07); [0.84, 1.12] |
| Slope SD (Time) | 0.11 (0.01); [0.09, 0.13] | 0.08 (0.01); [0.07, 0.10] |
b = Regression coefficient; SE = Standard Error; SD = Standard Deviation; CI = Confidence Interval; Pseudo-exp. = Pseudo-experimental group; Exp. = Experimental group
a Reference category: Control group
b Reference category: Pre-assessment
c p = 0.012