ArticleBJPsych open2025
Construct validity and reliability of the Dementia Test for People with Intellectual Disability: neuropsychological test battery for assessing cognitive functioning in people with intellectual disability.
Article in BJPsych open, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
1 citing paper in PubMed.
- Dementia in Intellectual Disability: An Exploratory Investigation of Comorbidity Patterns and Diagnostic Outcomes.Journal of intellectual disability research : JIDR · 2025Article
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundPeople with an intellectual disability are vulnerable to additional disorders such as dementia. Psychometrically sound and specific instruments are needed for assessment of cognitive functioning in cases of suspected dementia.
aimsTo evaluate the construct and item validity, internal consistency and test-retest reliability of a new neuropsychological test battery, the Dementia Test for People with Intellectual Disability (DTIM).
methodThe DTIM was applied to 107 individuals with intellectual disability with (
resultsConfirmatory factor analysis at the scale level showed that a one-factor model fitted the data well (root mean square error of approximation < 0.06, standardised root mean square residual < 0.08, comparative fit index > 0.9). At the domain level, one-factor models showed reasonable-to-good fit index for five of seven domains. Internal consistency indicated excellent reliability of the overall scale (Cronbach's α: 0.94 for dementia and 0.95 for controls). Item analysis revealed a wide range of difficulties (0.19-0.75 for dementia, 0.31-0.87 for controls), with minimal floor and ceiling effects. Eleven items (26%) had discrimination value ≤ 0.50. Test-retest reliability (
conclusionsThe DTIM fits a one-factor model and demonstrates internal and test-retest reliability; thus, it is suitable for use in cases of suspected dementia in people with various intellectual disabilities.
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