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Validation of the NIH Toolbox Cognitive Battery in intellectual disability
Rebecca H Shields1, Aaron J Kaat1, Forrest J McKenzie1
1From the University of California Davis Medical Center (R.H.S.); Human Development Graduate Group (R.H.S.), University of California Davis, Sacramento; Feinberg School of Medicine (A.J.K., R.C.G.), Northwestern University, Chicago, IL; MIND Institute and Department of Psychiatry and Behavioral Sciences (F.J.M., A.D., S.M.S., D.H.), University of California Davis Medical Center, Sacramento; Morgridge College of Education (J.C., K.R.), University of Denver, CO; Departments of Pediatrics (C.M., E.B.-K.) Neurological Sciences (E.B.-K.), and Biochemistry (E.B.-K.), Rush University Medical Center, Chicago, IL; and Graduate School of Education (K.F.W.), University of California, Riverside.
The NIH-Toolbox Cognitive Battery (NIHTB-CB) is a reliable and valid tool for measuring cognitive function in individuals with intellectual disability (ID) aged 5 and older. Further adaptations are needed for younger children or those with lower mental ages.
Area of Science:
- Neuroscience
- Developmental Psychology
- Psychometrics
Background:
- Accurate cognitive outcome measurement is crucial for advancing research in intellectual disability (ID).
- The NIH-Toolbox Cognitive Battery (NIHTB-CB) offers a standardized approach to assess cognitive abilities.
Purpose of the Study:
- To establish administration guidelines for the NIHTB-CB in individuals with ID.
- To evaluate the psychometric properties, including feasibility, reliability, and validity, of the NIHTB-CB for clinical research in ID populations.
Main Methods:
- Assessed 242 individuals (ages 6-25) with fragile X syndrome, Down syndrome, and other IDs.
- Evaluated feasibility, test-retest reliability, and convergent validity over a 1-month interval.
- Developed accommodations and guidelines documented in an e-manual; assessed sensitivity to known cognitive phenotypes.
Main Results:
- Excellent feasibility for mental ages 5.0 years and above; varied feasibility for mental ages 3-4.
- Moderate to strong reliability and convergent validity observed.
- NIHTB-CB scores correlated with IQ and adaptive behavior; detected expected deficits in FXS and DS.
Conclusions:
- The NIHTB-CB is a reliable and valid cognitive assessment for individuals with ID (mental age ≈5+).
- Adaptations are necessary for younger children or those with lower mental ages to expand its developmental range.
- Further research on sensitivity to developmental and treatment changes is warranted.
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