VALIDATION OF THE SNIJDERS-OOMEN NONVERBAL INTELLIGENCE TEST-REVISED-2-1 2-7 FOR AUSTRALIAN CHILDREN WITH DISABILITIES/

One hundred and fifty-five preschool children (59 with hearing impairm ent, 37 with developmental delay, and 59 nondisabled children) were te sted with the Snijders-Oomen Nonverbal Intelligence Test - Revised (2 1/2 - 7) (SON-R 2 1/2 - 7) and the Wechsler Preschool and Primary Scal e of Intelligence - Revised (WPPSI-R). The aim of the study was to exa mine the suitability of the SON-R 2 1/2 - 7 for Australian children. W ithin each group, the two tests were counterbalanced Children with hea ring impairment or developmental delay were given only the Performance Scale of the WPPSI-R. Correlations between SON-R 2 1/2 - 7 IQ and WPP SI-R Performance IQ averaged around .73 for the three groups, In the n ondisabled group, the SON-R 2 1/2 - 7 IQ correlated .52 with the Verba l IQ of the WPPSI-R and .75 with the Full Scale IQ. The SON-R 2 1/2 - 7 appeared to provide a satisfactory test of general intelligence for Australian preschool children, bur IQs obtained on the SON-R 2 1/2 - 7 tended to underestimate those obtained on the WPPSI-R.