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Reynolds Intellectual Assessment Scale, Second Edition (RIAS-2)
Reynolds Intellectual Assessment Scale, Second Edition (RIAS-2)
| Availability |
Please visit this website for more information about the instrument: Reynolds Intellectual Assessment Scale, Second Edition
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| Classification |
Supplemental: Mitochondrial Disease (Mito)
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| Short Description of Instrument |
A brief measure assessing intelligence and its major components normed for use in individuals aged 3-94 years. It can be used as a stand-alone intellectual assessment or as part of a larger battery to diagnose specific disorders such as intellectual disabilities or learning disabilities, and as a way to determine educational placement.
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| Comments/Special Instructions |
The RIAS-2 measures five important aspects of intelligence: general intelligence, verbal intelligence, nonverbal intelligence, memory and processing speed (Raines et al., 2018). There are eight subtests. Two subtests targeting processing speed are new to the RIAS-2 and this measure also encompasses a two-subtest abbreviated intelligence test called the Reynolds Intellectual Screening Test, Second Edition (RIST-2) (McNicholas & Floyd, 2017).
Four intelligence subtests: Guess What, Odd-Item Out, Verbal Reasoning and What's Missing
Two memory subtests: Verbal and Nonverbal
Two processing speed subtests: Speeded Naming Task and Speeded Picture Search (Reynolds & Kamphaus, 2015; McNicholas & Floyd, 2017)
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| Scoring and Psychometric Properties |
Scoring: Provides standard scores for 5 indices: Composite Intelligence Index, Verbal Intelligence Index, Nonverbal Intelligence Index, Composite Memory Index and Speeded Processing Index. Two subtests are included in each index, with T-scores reported for each subtest.
Psychometric Properties: Internal consistency studies associated with the RIAS-2 indexes exceed .90 across age groups. Criterion-rated validity was assessed by examining correlations between the RIAS-2 indices and the WISC-IV, WAIS-IV, AAB, FAR, WPPSI and ChAMP and correlations were found to be strong and as expected. For additional psychometric properties information see McNicholas & Floyd, 2017.
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| Rationale/Justification |
Strengths: Brief administration time, with all 8 subtests completed in less than one hour, assessment of g in less than 15 minutes and stand-alone assessment of memory and speeded processing available in 10-15 minutes or 5-10 minutes, respectively.
Can be administered remotely, or in person.
Low emphasis on motor skills, which can be impacted by mitochondrial disease.
Weaknesses: Because it is a brief measure, it is not accepted as a full measure of intellectual ability in some applications (e.g., assessing for disability services).
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| References |
Key References:
Reynolds CR, Kamphaus RW. Reynolds Intellectual Assessment Scales (RIAS-2) and the Reynolds Intellectual Screening Test (RIST-2) professional manual. Assessment. 2015.
McNicholas PJ & Floyd RG. A Review of the Reynolds Intellectual Assessment Scales, Second Edition, and the Reynolds Intellectual Screening Test, Second Edition. Can J Sch Psychol. 2017;32(2):176-80.
Raines TC, Reynolds CR, Kamphaus RW. The Reynolds Intellectual Assessment Scales, Second Edition, and the Reynolds Intellectual Screening Test, Second Edition. In: Flanagan DP & McDonough EM (Eds.), Contemporary Intellectual Assessment: Theories, Tests, and Issues., 2018., pp. 533-52. The Guilford Press.
Additional References:
Allen DN, Stolberg PC, Thaler NS, Sutton G, Mayfield J. Validity of the RIAS for assessing children with traumatic brain injury: Sensitivity to TBI and comparability to the WISC-III and WISC-IV. Appl Neuropsychol Child. 2014;3(2):83-93.
Brueggemann AE, Reynolds CR, Kamphaus RW. The Reynolds Intellectual Assessment Scales (RIAS) and Assessment of Intellectual Giftedness. Gifted Educ Intl. 2006;21:127-36.
Document last updated March 2024
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