Table 2.
Differences between study groups over time by PREMIS scales
| Group comparison Mean (Standard Deviation) |
Group differences | |||||||
|---|---|---|---|---|---|---|---|---|
| PREMIS Scales | Comparison (n = 17) | Intervention (n = 17) | Interaction effect | Effect Size | Main effect | Effect size | ||
| Background: | Pre | Post | Pre | Post | ||||
| • Perceived preparation | 4.65 (1.21) | 4.74 (1.22) | 3.83 (1.11) | 5.54 (0.68) | F (1,30) = 16.01, p = .000 | 0.348 | F (1,30) = 20.06, p = .000 | 0.401 |
| • Perceived knowledge | 4.06 (1.23) | 4.25 (1.37) | 3.54 (1.03) | 5.11 (0.67) | F (1,32) = 19.56, p = .000 | 0.379 | F (1,32) = 31.85, p = .000 | 0.499 |
| Actual knowledge | ||||||||
| • Actual knowledge | 27.17 (3.03) | 26.12 (7.41) | 26.59 (2.72) | 29.29 (3.24) | F (1,32) = 5.15, p = .030 | 0.139 | F (1,32) = 0.986, p = .328 | 0.030 |
| Opinions | ||||||||
| • Preparation | 3.26 (0.94) | 3.43 (0.72) | 3.29 (0.67) | 3.96 (0.89) | F (1,30) = 2.27, p = .142 | 0.070 | F (1,30) = 6.57, p = .016 | 0.180 |
| • Workplace issues | 3.57 (0.54) | 3.63 (0.61) | 3.52 (0.45) | 3.83 (0.53) | F (1,31) = 2.13, p = .154 | 0.065 | F (1,31) = 4.63, p = .039 | 0.130 |
| • Self-efficacy | 3.02 (0.45) | 3.11 (0.67) | 2.73 (0.53) | 2.91 (0.48) | F (1,32) = 0.28, p = .601 | 0.009 | F (1,32) = 2.51, p = .123 | 0.073 |
| • Alcohol/drugs | 3.63 (0.58) | 3.62 (0.73) | 3.44 (0.57) | 3.45 (0.57) | F (1,30) = 0.01, p = .958 | 0.000 | F (1,30) = 0.01, p = .958 | 0.000 |
| • Victim understanding | 3.78 (0.67) | 3.81 (0.58) | 3.57 (0.38) | 3.91 (0.54) | F (1,32) = 3.15, p = .085 | 0.090 | F (1,32) = 4.46, p = .042 | 0.122 |
| Practice Issues | ||||||||
| • Practice issues | 10.14 (4.51) | 8.65 (5.10) | 7.36 (3.41) | 11.77 (5.81) | F (1,32) = 10.51, p = .003 | 0.247 | F (1,32) = 2.57, p = .118 | 0.074 |
Note: all scores treated as continuous data with higher scores indicating better outcome (some negatively worded items reversed)