Leiter International Performance Scale

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Leiter International Performance Scale or simply Leiter is a intelligence test for children and adolescents, with norms ranging from 2 to 20 years. For all ages, it yields an intelligence quotinent (IQ) and a measure of logical ability.

One of the major features of Leiter is that it can be administered completely without the use of oral language, and is considers to be more accurate for testing children on other languages than their mother tongue, or with problems with hearing.

The latest version of Leiter is called Leiter-R (Revised). LEITER INTERNATIONAL PERFORMANCE TEST:

The Leiter devised an experimental edition of the test in 1929 to asses the intelligence of those with hearing or speech impairment and who with non English speaking examinees. A remarkable feature of Leiter is the complete elimination of verbal instructions. The Leiter does not require a single spoken word from the examiner or the examinee. AGE LIMIT: An age range of 2 years to 20 years and 11 months, the Leiter is particularly suitable for children and adolescents whose English speaking skills are weak. This includes children with any of these features: Non English speaking, autism, traumatic brain injury, speech impairment, hearing problem.

The Leiter contain 20 subtests organized into four domain:

Reasoning Visualization Memory Attention Not all subtests are administered to every child

SUBTESTS: The four Reasoning subtest include • Classification • Design analogies The six Visualization subtest includes • Matching • Figure ground • Paper folding • Figure rotation

The eight Memory subtest include • Memory span • Spatial memory • Association memory • Delayed recognition memory The two attention subtests consist of an • Underlining test (marking all squares printed on a page full of geometric shapes) • Measure of divided attention (observing a moving display and simultaneously sorting cards correctly)

This series of tests is graded in difficulty, beginning at age 2 and continuing through age 18. It is intended, presumably for use with adults as well as with children