Table 3.
Knowledge Test (CHATS) Score Changes
| Intervention group | N | Time 1 or 2 Mean (SD) |
Time 2 or 3 Mean (SD) |
Change Mean (SD) |
p |
|---|---|---|---|---|---|
| Waitlist control: Time 1 (pretest 1) to Time 2 (pretest 2) | 64 | 58.7 (20.5) | 63.0 (17.6) | 4.3 (20.2) | .091 |
| Waitlist control crossover: Time 2 (pretest 2) to Time 3 (posttest) | 35 | 64.0 (17.6) | 86.8 (13.8) | 22.9 (19.4) | <.001 |
| Immediate: Time 1 (pretest) to Time 2 (posttest) | 95 | 63.0 (18.8) | 83.8 (13.4) | 20.8 (22.7) | <.001 |
| Immediate + waitlist control crossover: pretest to posttest | 130 | 61.9 (20.0) | 84.6 (13.5) | 22.7 (22.3) | <.001 |
Notes: CHATS = Changing Talk Scale; SD = standard deviation. Knowledge test (CHATS) scoring: 13 items scored incorrect (0) or correct (1). Test score was calculated as the percentage of correct answers. At Time 1 no participant had completed the training. At Time 2 only immediate group participants completed the training. At Time 3 wait-listed control participants completed the training. p Values are for the paired-samples t test.