Table 4.

Pre- and post-measures of treatment credibility and expectations using the Treatment Credibility Scale

Pre-intervention Mean (SD)		Post-intervention Mean (SD)	t value	Effect size d (95% CI)
Participants with ASD	7.15 (1.55) n = 65	7.63 (1.76) n = 65	2.64**	0.29 (-0.06 – 0.63)
Close relations	7.56 (1.23) n = 59	8.29 (1.20) n = 59	4.74***	0.60 (0.23 – 0.97)
Course leaders	7.03 (1.29) n = 13	7.15 (1.37) n = 13	0.49	0.09 (-0.63 – 0.86)

Note: ** p < 0.01, *** p < 0.001. Effect sizes refer to Cohen’s d, parentheses include the 95% confidence interval (CI)