Wechsler Preschool and Primary Scale of Intelligence Scoring

The WPPSI-III provides Verbal and Performance IQ scores as well as the Full Scale IQ. In addition, the Processing Speed Quotient (known as the Processing Speed Index on previous Wechsler scales) can be derived for children aged 4:0 - 7:3, and a General Language Composite can be determined for children in both age bands (2:6-3:11 & 4:0-7:3). Children in the 2:6-3:11 age band are administered only five of the subtests: Receptive Vocabulary, Block Design, Information, Object Assembly, and Picture Naming.

Quotient and Composite scores have a mean of 100 and a standard deviation of 15. Subtest scaled scores have a mean of 10 and a standard deviation of 3. For Quotient and Composite scores,

below 69 is Extremely Low,
70-79 is Borderline,
80-89 is Low Average,
90-109 is Average
110-119 is High Average,
120-129 is Superior,
130+ is Very Superior.

This is true for all Wechsler Scales.