What is the WISC – IV?
This fourth generation of the most widely used children’s intellectual ability assessment meets your testing needs for the twenty-first century.
Benefits of WISC–IV
- Expand and strengthen clinical utility to support your decision-making
- Develop the four Index Scores as the primary interpretive structure
- Improve the assessment of fluid reasoning, working memory and processing speed
- Improve subtest reliabilities, floors and ceilings from WISC–III
- Co-normed with the recently published WISC-ll (which replaces the WOND, WORD and WOLD)
- Updated, colorful, child-friendly artwork
- Instructions to both the examiner and the child are improved to make the WISC–IV even more user friendly.
Three WISC–III subtests have been eliminated from WISC-IV: Object Assembly, Mazes and Picture Arrangement. WISC–III subtests that are now supplemental include Picture Completion, Arithmetic and Information.
Several new subtests are added to reflect current clinical knowledge and practice:
- Word Reasoning – measures reasoning with verbal material; child identifies underlying concept given successive clues.
- Matrix Reasoning – measures fluid reasoning (a highly reliable subtest on WAIS–III and WPPSI-III ); child is presented with a partially filled grid and asked to select the item that properly completes the matrix.
- Picture Concepts – measures fluid reasoning, perceptual organization, and categorization (requires categorical reasoning without a verbal response); from each of two or three rows of objects, child selects objects that go together based on an underlying concept.
- Letter-Number Sequencing – measures working memory (adapted from WAIS–III); child is presented with a mixed series of numbers and letters and repeats them numbers first (in numerical order), then letters (in alphabetical order).
- Cancellation – measures processing speed using random and structured animal target forms (foils are common non-animal objects).
- In addition, new optional recall procedures have been added to the Coding subtest, including free recall, cued digit recall and cued symbol recall.