WPPSI™-III and IV Tests What are the WPPSI™-III and IV Tests? The Wechsler Preschool and Primary Scale of Intelligence™ (3rd and 4th edition) or WPPSI-III and IV tests are IQ tests that assess your 2:6 to 7:7-year-old’s intellectual quotient. A psychologist administers the test one-on-one to a child. Both versions of the WPPSI test assess a child’s verbal, non-verbal/performance and processing speed abilities. The WPPSI-IV test also measures a child’s working memory skills. Schools frequently use this test to assess children for gifted and talented programs and for private school admissions. Wechsler Preschool and Primary Scale of Intelligence™ – Third Edition (WPPSI™ – III) and Wechsler Preschool and Primary Scale of Intelligence™ – Fourth Edition (WPPSI™ – IV) are trademarks of Pearson Education, Inc or its affiliate(s), or their licensors. TestingMom.com is not affiliated with nor related to Pearson Education, Inc or its affiliates (“Pearson”). Pearson does not sponsor or endorse any TestingMom.com product, nor have TestingMom.com products or services been reviewed, certified, or approved by Pearson. Trademarks referring to specific test providers are used by TestingMom.com for nominative purposes only and such trademarks are solely the property of their respective owners.