Table 3.

Mean scores on each questionnaire area at pre-day 1 and post-day 2.

	Score* (mean ± s.d.)		p	Size effet (Cohen’s d)
	Pre-day 1	Post-day 2
MI knowledge (n = 24)	49.3 ± 16.3	76.4 ± 6.8	<0.001	1.66
MI skills application – 1 open-response item (n = 20)	4.4 ± 3.4	9.7 ± 4.2	<0.001	1.56
MI skills application – 15 Likert-scale items (n = 24)	36.9 ± 18.6	58.2 ± 23.2	<0.001	1.04
Self-confidence in using MI (n = 23)	69.3 ± 15.1	80.8 ± 7.9	0.001	0.80

*Scores were converted onto a 100-point scale, except for the open-response item.