The NIH Toolbox Cognitive Battery for intellectual disabilities: three preliminary studies and future directions

Table 5 Study 3 feasibility, convergent validity, and discriminant validity

	Feasibility (% valid)		Convergent validity		Discriminant validity
	ID combined (study 3)	Age 3–15, general population^a	ID combined (study 3)	Age 3–6, general population^a	ID combined (study 3)	Age 3–6, general population^a
DCCS	72.2 %	79.8 %	−.51*	.69***	.65***	.79***
			KiTAP flexibility errors	WPPSI-III block design	PPVT-4
Flanker	77.8 %	83.7 %	−.61***	.60***	.61***	.67***
			KiTAP distractibility	WPPSI-III block design	PPVT-4
Picture vocabulary^b	100.0 %	83.7 %	.92***	.90***	.53***	.53***
			PPVT-4		Leiter-R forward + Spatial memory z score	BVMT-R + RAVLT
Oral reading^b	94.4 %	98.1 %	91***	.96***	.56***	.53***
			WJ-4 letter/word ID	WRAT-IV	Leiter-R forward + Spatial memory z score	BVMT-R + RAVLT
Picture sequence memory	88.9 %	98.1 %	.57***	.50***	.64***	.58***
			Leiter-R forward + Spatial memory	NEPSY-II sentence repetition	PPVT-4
Pattern comparison	66.7 %	94.4 %	−.40	.43***	.49**	.44***
			KiTAP go/no-go median RT	WPPSI-III processing speed	PPVT-4
List sorting	52.8 %	95.7 %	.76***	.57***	.76***	.63***
			SB-5 verbal WM	NEPSY-II sentence	PPVT-4

Validity data shown are Pearson’s correlations
*p < .05; **p < .01; ***p < .001
^aZelazo and Bauer [59]
^bEstimates reported for the general population are aggregated across the entire child and adolescent sample ranging from 3 to 15 years old

ISSN: 1866-1955