The validity of the universal nonverbal intelligence test with the Woodcock-Johnson III tests of achievement

Abstract

The current study examined the validity of the Universal Nonverbal Intelligence Test (UNIT), an intelligence test that purports to measure intelligence using a nonverbal method of administration, by comparing it to the Woodcock-Johnson III Tests of Achievement (WJ-III). One hundred and twenty-one children were administered the standard battery of the UNIT and selected WJ-III subtests. Results indicated that the sample's mean UNIT Full Scale IQ was significantly higher than the mean WJ-III Broad Mathematics, Broad Written Language, and Broad Reading cluster scores. The UNIT showed a stronger relationship with the WJ-III Broad Math scores than with the WJ-III Broad Reading and Written Language scores. The implications of these findings are discussed. © NAJP.