Table 5.

Spearman’s Rho Correlations of Internalizing and Externalizing Behavior Scores in RTT

		Internalizing Externalizing
Behavior	Subscale or Item	CHQ MH	Irritability	Self- mutilation	Aggressive behavior	Biting self & others
Internalizing	CHQ MH	1	−.141**	−.086*	−.080*	−.126**
Externalizing	Irritability	−.141**	1	.228**	.220**	.238**
	Self-mutilation	−.086*	.228**	1	.293**	.468**
	Aggressive behavior	−.080*	.220**	.293**	1	.308**
	Biting self & others	−.126**	.238**	.468**	.308**	1

^*Note. p <0.05,

^**p <0.01;

− 0.3 to 0.3 = negligible correlations, 0.3 to 0.5 = low positive correlations (also shown in bold print); no moderate or high correlations were found. CHQ MH = Child Health Questionnaire Mental Health Subscale. RTT= Rett syndrome.