Wechsler Preschool and Primary Scale of Intelligence Test (WPPSI-III) - 3rd Edition
The WPPSI-III does not require the child to read or write.

There are four composite scores (one is optional), that should be provided to you:
  1. Verbal IQ (VIQ)
  2. Performance IQ (PIQ)
  3. Processing Speed Quotient (PSQ)
  4. General Language  (GLC) - optional composite
  5. Full Scale IQ (FSIQ)
Verbal IQ is based on Information, Vocabulary, and Word Reasoning. (Comprehension and Similarities are possible substitutes for the other verbal subtests.)

Performance (fluid) IQ is based on Block Design, Matrix Reasoning, and Picture Concepts. (Picture Completion and Object Assembly are possible substitutes for the other Performance subtests.)

Processing Speed Quotient, or visual-motor, clerical speed and accuracy, includes Coding & Symbol Search.  For children age 4 up to 7 & 3 months, this Quotient (PS) can be administored.  

General Language Composite is based on Receptive Vocabulary and Picture Naming

Full Scale IQ is based on seven tests: 3 Verbal, 3 Performance (fluid), and 1 Processing Speed test.

Each of these IQs are composite scores.  Both the Verbal and Performance IQ scores are composites of five different subtests, each of which measures a different area of ability (this test is not an achievement test).  The Full Scale IQ is a composite of the Verbal and Performance scores, which makes it a composite of fourteen different subtests.

Check for a GAP between the Verbal IQ and the Performance IQ.  One indicator of a severe learning disability is when the gap is approaching two standard deviations (approximately 30 points or more); this would be looked at as a severe discrepancy.  Another indication is a severe discrepancy between the child's intelligence and educational test scores, or if there is a significant SCATTER between subtests scores.  The child may have perceptual or processing disorder.
(P. W.  D.  Wright and P. D. Wright (1983)).


  1. Block Design - While viewing a constructed model or a picture in a Stimulus Book, the child uses one or two color blocks to recreate the design within a specified time limit.
  2. Information - For Picture Items, the child responds to a question by choosing a picture from four response options. For Verbal Items, the child answers questions that address a broad range of general knowledge topics.
  3. Matrix Reasoning - The child looks at an incomplete matrix and selects the missing portion from 4 or 5 response options.
  4. Vocabulary - For Picture Items, the child names pictures that are displayed in a Stimulus Book. For Verbal Items, the child gives definitions for words that the examiner reads aloud.
  5. Picture Concepts - The child is presented with two or three rows of pictures and chooses one picture from each row to form a group with a common characteristic.
  6. Symbol Search - The child scans a search group and indicates whether a target symbol matches any of the symbols in the search group.
  7. Word Reasoning - The child is asked to identify the common concept being described in a series of increasingly specific clues.
  8. Coding - The child copies symbols that are paired with simple geometric shapes. Using a key, the child draws each symbol in its corresponding shape.
  9. Comprehension - The child answers questions based on his or her understanding of general principles and social situations.
  10. Picture Completion - The child views a picture and then points to or names the important missing part.
  11. Similarities - The child is read an incomplete sentence containing two concepts that share a common characteristic. The child is asked to complete the sentence by providing a response that reflects the shared characteristic.
  12. Receptive Vocabulary - The child looks at a group of four pictures and points to the one the examiner names aloud.
  13. Object Assembly - The child is presented with the pieces of a puzzle in a standard arrangement and fits the pieces together to form a meaningful whole within 90 seconds.
  14. Picture Naming - The child names pictures that are displayed in a Stimulus Book.

The information on this was adapted from sited websites, books,  parent discussions and emails. For more information  please visit these other websites:

Fairleigh Dickinson University, website created by Dumont/Willis

Pearson, Inc. WPPSI III test


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This webpage was created July 30, 2009 by Melody Orfei
Webpage last modified on July 30, 2009 - V1, by Melody Orfei