The Wechsler tests are the most common individually administered IQ tests. They currently include the Wechsler Preschool and Primary Scale of Intelligence-Fourth Edition WPPSI-IV; age 2.5 – 7.5 years), Wechsler Intelligence Scale for Children-Fifth Edition (WISC-V; age 6-16 years), the Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV; age 16-90 years).
What is the WPPSI-IV?
The Wechsler Preschool and Primary Scale of Intelligence-Fourth Edition is launching in the fall of 2012. The WPPSI-IV is a standardized, individually administered test of intelligence that is used to assess a range of cognitive abilities that represent a sample of what a child has learned and can use at the time of testing. The test measures a child’s current ability to solve problems, think abstractly, deal with new situations, and profit from experience.
The Full Scale IQ (FSIQ) is derived from a combination of subtest scores and is considered the most representative estimate of global intellectual functioning. The WPPSI-IV consists of four index scores that comprise the Full Scale IQ, namely the Verbal IQ (VIQ), the Performance IQ (PIQ), the Working Memory IQ (WMI), and the Processing Speed IQ (PSIQ). Index scores between 90 and 110 are considered in the Average range.
What is the WPPSI-IV used for?
Psychologists use the WPPSI–IV to help identify children with cognitive disabilities, developmental delays, or learning disabilities and help these children qualify for any needed special services. Psychologists also use the WPPSI-IV in recommending appropriate interventions for cognitive problems and determining admission eligibility for educational programs or schools.