Table 2.

Normalized T-scores (Mean ± SD) measured in Competence and Problem subscales of the Child Behavior Checklist (CBCL) and in Conners' Parent Rating Scale (CPRS) questionnaires in Control, heterogeneous-HIQ (Het-HIQ) and homogeneous-HIQ (Hom-HIQ) groups.

	CBCL					CPRS
	Competence	Withdraw Pb.	Thought Pb	Attention Pb.	Problem	Total
Control	37.0 ± 4.4	74.1 ± 16.1*	65.0 ± 8.3	64.7 ± 9.9	59.8 ± 9.0	58.0 ± 11.9
Het-HIQ	35.5 ± 5.2	76.3 ± 16.3*	71.0 ± 11.7*	72.2 ± 14.6*	62.4 ± 11.1	56.4 ± 9.2
Hom-HIQ	33.6 ± 6.1	64.4 ± 14.5	63.8 ± 8.5	65.4 ± 12.6	55.1 ± 11.3	51.0 ± 9.1

Normalized T-scores of Total Competence tests are abnormal if < 30.

^*Normalized T-scores of CBCL subscales are abnormal if > 70.