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The current investigation examined the validity of the Comprehensive Test of Nonverbal Intelligence (CTONI), an intelligence test that is purported to measure fluid intelligence. The CTONI was evaluated in comparison with the Kaufman Adolescent and Adult Intelligence Test (KAIT), an established measure of fluid and crystallized intelligence. Ninety-seven adults were administered these instruments in counterbalanced order. Results indicated that the sample's mean CTONI Nonverbal IQ (NIQ) deviated significantly from the mean KAIT Crystallized, Fluid, and Composite IQs. The CTONI mean NIQ underestimated KAIT Fluid and Composite IQs when individual participants were subdivided into existing KAIT ability categories and mean score comparisons were made. Results also indicated that the CTONI NIQ correlated strongly and positively with the KAIT Composite and Fluid IQs. Furthermore, the CTONI Geometric NIQ scale clearly demonstrated discriminant and convergent validity, whereas, the CTONI Pictorial NIQ (PNIQ) did not.

This study examined the validity of a parent-report inventory, the Child Development Inventory (CDI), as a developmental screening instrument in high-risk toddlers and preschoolers. Seventy-six children, aged 15-70 months, were assessed in a neonatal high-risk developmental follow-up clinic. The data included the completion of CDIs by parents/caregivers and developmental evaluations by a physician using either the Clinical Adaptive Test/Clinical Linguistic Auditory Milestone Scale (CAT/CLAMS) (15-35 months) or Slosson Intelligence Test (36-70 months). Analysis revealed a good level of sensitivity (true "abnormals"--73%) and specificity (true "normals"--87%) for the CDI General Development score. The findings suggested that the CDI is a valid and useful screening instrument for high-risk infants.