The study examined the relationship among the Test of Nonverbal Intelligence (TONI), the Kaufman Assessment Battery for Children (K-ABC), and the Wechsler Intelligence Scale for Children-Revised (WISC-R) for a sample of learning-disabled children. The results indicated that the TONI score was significantly lower than the K-ABC Simultaneous Processing Scale and the WISC-R Performance and Full Scale IQs. The TONI correlated significantly with the K-ABC Arithmetic and Reading Understanding achievement tests and with the Kamphaus and Reynolds Reading Composite score. The TONI's discriminant validity was examined; implications for practice are discussed.
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