The Wechsler Preschool and Primary Scale of Intelligence – Fourth Edition (WPPSI-IV; Wechsler, 2012) is an individually administered, standardized instrument for assessing the intelligence of children aged 2 years, 6 months through 3 years, 7 months.
The Wechsler Preschool and Primary Scale of Intelligence includes short, game-like tasks that engage young children. The WPPSI-IV provides a Full Scale IQ, Verbal Comprehension, Visual Spatial, and Working Memory for ages 2 years, 6 months and 3 years, 11 months. For ages four months and 3 years, 7 months, the WPPSI-IV provides a Full Scale IQ, Verbal Comprehension, Visual Spatial, Fluid Reasoning, Working memory, and Processing Speed. Ancillary subtests may be given to obtain additional scores for Vocabulary Acquisition, Nonverbal, and General Ability (for all ages) and Cognitive Proficiency (for older children).
The WPPSI-IV is a substantial improvement from its predecessor, the WPPSI-II (Soares, & McCrimmon, 2013). The newer version has omitted four of the original subtests, added five new subtests, and modified the contents of the five subtests that were retained (Watkins, 2013)
|Author (yr)||Age Range (yrs)||Method of Administration/Format||Approx. Time to Administer||Subscales|
|Wechsler Preschool and Primary Scales of Intelligence – Fourth Edition (WPPSI-IV) Wechsler (2012)||2 yrs., 6 mos. and 7 yrs., 7 mos.|| |
Individually administered norm-referenced measure of intelligence, clinician-administered; 13 subtests in all, including lower-level subtests designated for children 2.6 and 3.11 years old Yields subtest scaled scores, standard scores, percentiles.
|Ages 2.6 and 3.11: 30–45 min. Ages 0.4 and 7.7.: 45–60 min.|| |
Verbal Comprehension (Information, Similarities, Vocabulary Comprehension); Visual Spatial (Block Design, Object Assembly); Fluid Reasoning (Matrix Reasoning, Picture Concepts); Working Memory (Picture Memory, Zoo Locations); Processing Speed (Bug Search, Cancellation, Animal Coding)
Vocabulary Acquisition, Nonverbal, and
General Ability(ages 0.4 and 7.7) Vocabulary Acquisition, Nonverbal, General Ability, and Cognitive Proficiency
Availability: Pearson Assessment http://bit.ly/1shnCA9
|Author (yr)||Sample Size||Topic(s) Addressed||Outcome|
|Watkins & Beaujean||1,700 - Age Range: 2.6-7.7 (in years and months)||Confirmatory factor analyses of normative sample|| |
The bifactor model fit the WPPSI-IV normative sample data as well as or better than the higher-order models favored by Wechsler (2012). These results suggest that only the general intelligence dimension was sufficiently robust and precise for clinical use.