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.

ABSTRACT:

Background

People 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.

Aims

To 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).

Method

The DTIM was applied to 107 individuals with intellectual disability with (n = 16) and without (n = 91) dementia. The psychometric properties of the DTIM were assessed in a prospective study. The assessors were blinded to the diagnostic assignment.

Results

Confirmatory factor analysis at the scale level

SUBMITTER: Sappok T 

PROVIDER: S-EPMC12001923 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature