Standardized Tests Commonly Used for Assessment The Wechsler Preschool and Primary Scale of Intelligence (WPPSI) Published in 1967 by David Wechsler, this test was designed for ages 4 to 6 ???« and was a competitor of the Stanford-Binet. In 1989 the WPPSI was revised to test children 3 years of age to 7 years 3 months. About half of the original test items were retained and the artwork was improved. All forms of Wechsler’s tests yield Verbal, Performance, and Full Scale IQ with five or six Performance and Verbal scales depending on which form is being used. The intelligence testing requires a trained clinical examiner and should be administered, scored, and interpreted by a trained professional who is a psychologist or psychiatrist, preferably. The test takes 60-90 minutes to administer and is used to evaluate cognitive abilities and intellectual abilities in children or adults, depending on which Wechsler test is used. The eleven subtests are presented in this order, information, (animal pegs-optional), vocabulary, picture completion, object assembly, arithmetic, mazes, geometric design, similarities, block design, comprehension, and sentences. The Wechsler is a standardized test with standard score of 100 and standard deviation of 15. A trained psychologist will evaluate and interpret an individual’s performance on the scale’s subtests to discover their strengths and weaknesses then offer recommendations based on these findings. There are six variables used to select the standardization sample: age, gender, geographic region, ethnicity, parental education and occupation as an indicator of socioeconomic status. Norms are provided for children aged 2 years 11 months, 16 days through 7 years, 3 months, 15 days (p405, Sax). Depending on the test subtests may be all Verbal then all Performance or alternate from Verbal to Performance and back. The lowest reliability is with Object Assembly and highest with Similarities. A small sampl…
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