. Author manuscript; available in PMC: 2015 Mar 1.

Published in final edited form as: Psychol Med. 2013 May 10;44(4):821–830. doi: 10.1017/S0033291713000974

Table 1.

Descriptive Statistics.

	Females					Males					Cohen’s d effect size
	Mean (SD)	n	% above -off	Min	Max	Mean (SD)	n	% above cut-off	Min	Max	Cohen’s d effect size
RB	1.22 (1.42)	470	7.0	0	14	1.75 (1.85)	530	7.2	0	14	−.32^**
Prosocial Peer Affiliation	15.58 (1.62)	470	---	10	20	14.90 (1.63)	528	---	10	20	.42^**

Note. % above cut-off refers to the proportion of participants who scored in the marginal- or clinically-significant range on the Rule-Breaking (RB) scale by either mother or father report (as defined in the CBCL manual; Achenbach and Rescorla, 2001). RB could conceivably range from 0 to 34. Prosocial peer affiliation could conceivably range from 5 to 20. Means were compared across boys and girls using independent samples t-tests,

^**

p<.01.