Table 3.
Mean scores compared with paired-samples t test (and related effect sizes) for the experimental group (n = 56) and the control group (n = 55) at pre- and post-test for the variables with significant interaction
| Pre-test | Post-test | T | d | |||
|---|---|---|---|---|---|---|
| M | SD | M | SD | |||
| Knowledge about gambling | ||||||
| Experimental group | 21.38 | 2.95 | 26.21 | 3.52 | − 8.82*** | 1.18 |
| Control group | 22.07 | 3.41 | 22.56 | 3.67 | − 1.72 (n.s.) | – |
| Misconceptions | ||||||
| Experimental group | 17.16 | 2.31 | 12.45 | 2.86 | 9.56*** | 1.28 |
| Control group | 16.25 | 3.03 | 15.93 | 3.01 | 1.18 (n.s.) | – |
| Attitudes | ||||||
| Experimental group | 24.02 | 3.65 | 21.21 | 4.08 | 4.11*** | 0.55 |
| Control group | 23.76 | 4.47 | 23.93 | 4.17 | − 0.48 (n.s.) | – |
| Total hours | ||||||
| Experimental group | 0.16 | 0.27 | 0.08 | 0.17 | 2.43* | 0.32 |
| Control group | 0.12 | 0.22 | 0.12 | 0.19 | (n.s.) | – |
n.s. non-significant
*p < 0.05; **p < 0.01; ***p < 0.001