Table 3.
Mean Values and Group X Time Interaction Effects on Self-efficacy for PA, Motivation, and Social Comparison.
| Attention Control Group |
Intervention Group |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pre (n = 24) |
Post (n = 22) |
Pre (n = 26) |
Post (n = 21) |
Model Estimates |
||||||||
| Measure | Range | M | SD | M | SD | M | SD | M | SD | Beta | T | p |
| Self-efficacy for PA | ||||||||||||
| Sticking to it | 7-35 | 3.79 | 0.81 | 3.49 | 0.85 | 3.95 | 0.75 | 3.78 | 0.74 | 0.046 | 0.215 | .830 |
| Making time | 4-20 | 4.00 | 0.84 | 3.71 | 0.83 | 4.18 | 0.81 | 3.75 | 0.74 | −0.186 | −0.794 | .432 |
| Motivation | 3-15 | 9.21 | 3.34 | 9.27 | 2.89 | 9.77 | 3.94 | 9.81 | 2.96 | −0.430 | −0.473 | .639 |
| Social Comparison Orientation (INCOM) | ||||||||||||
| Abilities | 5-25 | 15.63 | 3.96 | 15.09 | 3.97 | 15.19 | 3.83 | 15.52 | 3.17 | 0.419 | 0.572 | .570 |
| Opinions | 6-30 | 19.50 | 4.61 | 18.82 | 3.94 | 18.31 | 4.68 | 19.17 | 3.14 | 0.596 | 0.701 | .487 |
| Motive for social comparison (adapted SCMS) | ||||||||||||
| Distancing | 4-16 | 12.88 | 3.35 | 13.18 | 3.75 | 12.77 | 3.02 | 14.10 | 3.14 | 0.923 | 1.090 | .282 |
| Similarity | 3-12 | 7.58 | 2.94 | 7.86 | 3.22 | 7.73 | 2.94 | 9.05 | 2.39 | 0.796 | 0.907 | .371 |
| Enhancement | 4-16 | 10.38 | 4.20 | 10.68 | 4.32 | 10.54 | 4.16 | 11.76 | 3.83 | 0.528 | 0.536 | .595 |
| Modeling | 3-12 | 8.46 | 3.33 | 8.41 | 2.77 | 8.65 | 2.62 | 9.95 | 2.50 | 1.282 | 1.617 | .113 |
| Future | 6-24 | 18.71 | 5.40 | 18.45 | 5.82 | 18.58 | 5.27 | 20.24 | 4.19 | 1.468 | 1.058 | .296 |
Note. Hierarchical linear modeling used to test group by time interaction effect. PA = physical activity; INCOM = Iowa-Netherlands Comparison Orientation Measure; SCMS = Social Comparison Motives Scale.