. Author manuscript; available in PMC: 2015 Aug 18.

Published in final edited form as: Cogn Behav Pract. 2013 Feb;20(1):1–12. doi: 10.1016/j.cbpra.2011.12.004

Table 2. Mean Effect Size by Study Type.

Study Type	k	N	g	95%-CI	p-value
Pre-Post ^a	11	1,234	.57	>.31–.82	<.01
No-Contact/Waitlist	7	331	1.32	>.61–2.02	<.01
Treatment as Usual ^a	5	307	.38	>.11–.64	.01
Active Treatment	9	327	.67	>.38–.96	<.01
Overall	32	2,198	.69	>.51–.87	<.01

Note. Hedges' g is the effect size estimate reported; .2=small effect, .5=medium effect, and .8=large effect.

Rathus and Miller (2003) was coded twice (Pre-Post and TAU) as only partial data were reported for between-subject effects and within-subject effects as outcome measures were not administered to control group at posttreatment.