Processing Speed Index (WPPSI-IV)
The Wechsler Preschool and Primary Scale of Intelligence – Fourth Edition (WPPSI-IV) Processing Speed Index (PSI; formerly Processing Speed Quotient [PSQ]) was a new feature added to the third version of the WPPSI series and revised for the latest edition. The PSI was historically a composite score derived from subtests including Coding and Symbol Search. These subtests were initially modified from other Wechsler tests for use with younger children. The WPPSI-IV PSI has been revised with new subtests to improve utility with young children. Current processing speed subtests include Bug Search, Cancellation, and Animal Coding. Bug Search, a newly developed WPPSI-IV subtest, requires the child to match visual stimuli and is designed to be analogous to Symbol Search from the previous edition. Animal Coding is a speeded paired-associates subtest in which the child marks shapes that correspond to animals, similar in demands to the Coding subtest from...
References and Readings
- Canivez, G. L. (in press). Test review of Wechsler preschool and primary scale of intelligence – Fourth edition. In J. F. Carlson, K. F. Geisinger, & J. L. Jonson (Eds.), The nineteenth mental measurements yearbook. Buros Center for Testing: Lincoln.Google Scholar
- Wechsler, D. (2012a). Wechsler preschool and primary scale of intelligence – Fourth edition (WPPSI-IV): Administration and scoring manual. San Antonio: The Psychological Corporation.Google Scholar
- Wechsler, D. (2012b). Wechsler preschool and primary scale of intelligence – Fourth edition (WPPSI-IV): Technical and interpretive manual. San Antonio: The Psychological Corporation.Google Scholar