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Borderline intellectual functioning, previously called borderline mental retardation (in the ICD-8), [1] is a categorization of intelligence wherein a person has below average cognitive ability (generally an IQ of 70–85), [2] but the deficit is not as severe as intellectual disability (below 70). It is sometimes called below average IQ (BAIQ).
David Wechsler, developer of the Wechsler–Bellevue Scale of 1939 (which was later developed into the Wechsler Adult Intelligence Scale) popularized the use of "deviation IQs" as standard scores of IQ tests rather than the "quotient IQs" ("mental age" divided by "chronological age") then used for the Stanford–Binet test. [67]
The Stanford–Binet Intelligence Scales (or more commonly the Stanford–Binet) is an individually administered intelligence test that was revised from the original Binet–Simon Scale by Alfred Binet and Théodore Simon. It is in its fifth edition (SB5), which was released in 2003.
The Wechsler Adult Intelligence Scale (WAIS) is an Intelligence Quotient (IQ) test designed to measure intelligence and cognitive ability in adults and older adolescents. [1] For children between the ages of 6 and 16, Wechsler Intelligence Scale for Children (WISC) is commonly used.
An intelligence quotient (IQ) is a total score derived from a set of standardized tests or subtests designed to assess human intelligence. [1] Originally, IQ was a score obtained by dividing a person's mental age score, obtained by administering an intelligence test, by the person's chronological age, both expressed in terms of years and months.
The Stanford-Binet Intelligence Scales was a revised version of the Binet-Simon Intelligence test by Lewis Terman. He started his revision in 1910 and published it in 1916. [9] Terman used the 1908 version of the Binet-Simon test for his revision. [9] The most important addition is the replacement of mental age for the intelligence quotient (IQ ...
Patients recovering from traumatic brain injury (on average measuring in severely impaired ranged on the Glasgow Coma Scale) showed high stability in WTAR scores during their recovery period while performing highly similar to demographic estimates, suggesting the test is a reliable estimate of premorbid intelligence in individuals with TBI. [3]
Leiter International Performance Scale or simply Leiter scale is an intelligence test in the form of a strict performance scale. It was designed for children and adolescents ages 2 to 18, [ 1 ] although it can yield an intelligence quotient ( IQ ) and a measure of logical ability for all ages.