Actually, the WISC-IV is not a Woodcock-Johnson Test, however, it is similar. WJ-III and WISC-IV are both commonly used by professionals to gauge a subjects Intelligence Quotient.
The WJ-III, published in 2001, is the third and latest edition of the Woodcock�Johnson Tests of Cognitive Abilities. It was first developed in 1977 by Richard Woodcock and Mary E. Bonner Johnson, then revised in 1989. The typical battery of Woodcock-Johnson Tests consists of 7 evaluations, and an additional 14 are included in the extended battery. The WJ-III examines factors of Cattell-Horn-Carroll Theory such as Comprehension-Knowledge, Long-Term Retrieval, Visual-Spatial Thinking, Auditory Processing, Fluid Reasoning, Processing Speed, Short-Term Memory and Quantitative Knowledge and Reading-Writing Ability.
The WISC-IV, or Wechsler Intelligence Scale for Children 4th Edition, published in 2004, was originally developed by Dr. David Wechsler. It is an individually administered intelligence test for children between the ages of 6 and 16. The first WISC was an adaptation of several subtests contained in the Wechsler�Bellevue Intelligence Scale and several subtests that were designed specifically for it. The subtests were divided into Verbal and Performance scales and evaluated a subject's Verbal IQ (VIQ), Performance IQ (PIQ), and Full Scale IQ (FSIQ). The WISC was revised in 1974 and published as the WISC-R. The third edition, WISC-III, was published in 1991, and contained an additional subtest designed to measure processing speed. The WISC-III also included scores for Verbal Comprehension Index (VCI), Perceptual Organization Index (POI), Freedom from Distractibility Index (FDI), and Processing Speed Index (PSI)in addition to the original VIQ, PIQ, and FSIQ scores. Subjects that age 16 or older are usually evaluated using the current edition of the Wechsler Adult Intelligence Scale (WAIS), the WAIS-IV, published in 2008.
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