WISC-IV (Wechsler Intelligence Scale for Children - Fourth Edition): Introduced 4-composite structure for children

About the WISC-IV (Wechsler Intelligence Scale for Children - Fourth Edition)

WISC-IV (2003) was the major restructuring of the Wechsler children's test. The Psychological Corporation reorganized the subtests around 4 Composite scores derived from factor-analytic research: Verbal Comprehension Index (VCI), Perceptual Reasoning Index (PRI), Working Memory Index (WMI), and Processing Speed Index (PSI). The Verbal/Performance dichotomy of earlier WISC editions was abandoned.

WISC-IV added new subtests (Matrix Reasoning, Picture Concepts, Word Reasoning, Letter-Number Sequencing) and dropped Picture Arrangement, Object Assembly, and Mazes (deemed weak or redundant). 10 core subtests + 5 supplemental yielded FSIQ + 4 Composite scores.

WISC-IV dominated child intellectual assessment from 2003 until WISC-V in 2014. It is still in occasional use for longitudinal continuity with research started in the 2000s. The 4-Composite structure was preserved (and further refined) in WISC-V.

The 4 subtests

What the test looks like

WISC-IV is examiner-administered one-on-one with a child age 6-16. The examiner uses a stimulus book, blocks, puzzles, and other materials. The child responds verbally, by pointing, or by manipulating objects. Each subtest has basal and ceiling rules to keep administration efficient.

Verbal Comprehension subtests (Similarities, Vocabulary, Comprehension) involve spoken questions. Similarities asks "How are X and Y alike?" with progressively harder pairs. Vocabulary asks the child to define words ranging from "bicycle" to abstract terms. Comprehension asks practical-judgment questions about social situations and common knowledge.

Perceptual Reasoning subtests use visual stimuli. Block Design has the child reproduce designs with red-and-white blocks. Matrix Reasoning shows a visual pattern with one cell missing; the child picks the completion from 5 options. Picture Concepts shows 2-3 rows of pictures and asks the child to pick one from each row that go together.

Working Memory subtests are auditory: Digit Span (repeat digit sequences forward and backward) and Letter-Number Sequencing (reorganize mixed letter-number sequences). Processing Speed subtests are paper-and-pencil: Coding (substitute symbols for digits as fast as possible) and Symbol Search (scan rows of symbols for target matches).

Specific item content is a Pearson trade secret. The full test kit is sold to qualified examiners for clinical use.

Source

All test materials and historical content on this page are transcribed from:

Wechsler, D. (2003). WISC-IV Technical Manual. San Antonio: Psychological Corporation.

WISC-IV items are copyrighted (NCS Pearson). We document format and historical role.