What is the Wechsler Preschool and Primary Scale of Intelligence?

The Wechsler Preschool and Primary Scale of Intelligence (WPPSI) is a widely used individually administered intelligence test designed to assess the cognitive abilities of children aged 2 years 6 months to 7 years 3 months. It measures a child's intellectual functioning across various domains, providing a comprehensive profile of their cognitive strengths and weaknesses.

Unlike tests that simply provide a single overall IQ score, the WPPSI offers several composite scores, including:

* Full Scale IQ (FSIQ): A general measure of overall intellectual ability.

* Verbal Comprehension Index (VCI): Assesses verbal reasoning, knowledge, and comprehension.

* Visual Spatial Index (VSI): Measures spatial reasoning and visual-motor integration.

* Fluid Reasoning Index (FRI): Evaluates the ability to solve novel problems and think abstractly.

* Processing Speed Index (PSI): Measures the speed and efficiency of cognitive processing.

* Working Memory Index (WMI): Assesses the ability to hold information in mind and manipulate it.

These subtests are composed of various tasks, such as picture naming, block design, object assembly, and verbal reasoning questions, tailored to the developmental level of young children. The WPPSI helps identify children who may be gifted or have learning disabilities, and can be used in various settings, including educational planning, clinical evaluations, and research. There are several revisions of the WPPSI, with the most recent being the WPPSI-V (Fifth Edition), which reflects updated research and norms.