Reynolds Adaptable Intelligence Test (RAIT)
Author: Cecil R. Reynolds, PhD
The RAIT evaluates crystallized intelligence, fluid intelligence, and quantitative aptitude or intelligence, using seven subtests usable across a wide span of ages.
It requires minimal reading skill and almost no motor coordination or visual-motor skill, thus reducing the potential problems of manipulating objects such as blocks that are used in other measures of intelligence. The RAIT can be administered to groups or individuals using either a computer or paper and pencil, making it a practical option for use in schools, juvenile and adult justice systems, and clinical settings.
The RAIT was standardized on a nationally representative sample of 2,124 individuals. Clinical groups were included in the norming study, including individuals with intellectual disability, TBI, stroke, dementia, learning disability, hearing impairment, and ADHD. Analysis by multiple methods was conducted, based on item response theory and classical test theory, to guard against gender and ethnic bias of items.
Administration and Scoring
Test administration takes about 50 minutes for the full battery, 30 minutes for just the crystallized and fluid subtests. Subtest scores yield T-scores (M = 50; SD = 10); indexes are scaled to the IQ metric (M = 100; SD = 15). Subtest scores are used to calculate a Crystallized Intelligence Index, a Fluid Intelligence Index, a Quantitative Intelligence Index, a Total Intelligence Index, and a Total Battery Intelligence Index (TBII). The examiner has the option of obtaining results that do not include quantitative reasoning skills. Other derived scores, including z-scores, normal-curve equivalents, stanines, percentiles, and, for the younger ages, age equivalents, are also provided. A Score Summary Form allows tracking of examinees scores over multiple administrations.