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

Table 3 Study 2 ecological validity

	Chronological age	Mental age^a	FSIQ^b	Adaptive behavior composite
Dimensional change card sort	.23	.40**	.53**	.27
Flanker	−.02	.59***	.77***	.59**
Picture vocabulary	.32*	.22	.38	.26
Oral reading	.04	.61***	.71***	.73***
Picture sequence memory	.03	.14	.44*	.44*
Pattern comparison	.19	.24	.50**	.10
List sorting	.28	.54**	.61**	.50*
NIH-TCB cognitive composite	–	–	.75***	.61**

Data shown are Pearson’s correlations. Note: NIH-TCB age-adjusted z deviation scores were used to correlate with age-adjusted standardized measures (IQ, adaptive behavior), whereas computed or theta scores (unadjusted) were used for correlations with mental and chronological age
*p < .05; **p < .01; ***p < .001
^aIn study 2, mental age was either the actual mental age generated from individual IQ tests when test results were available or it was estimated by the examiner
^bIn study 2, IQ scores (Leiter-R or Stanford-Binet 5) were available from prior recent records in a subset of the sample (n = 25)

ISSN: 1866-1955