Background: The Learning Disability Screening Questionnaire (LDSQ) has been shown to have high sensitivity and specificity to identify those who are likely to meet intellectual disability diagnostic criteria (McKenzie, et al. ). However, there is no independent research to date to support these findings.
Materials And Methods: An archival research design was used, utilizing data from diagnostic tools including the LDSQ, Wechsler Adult Intelligence assessments and Adaptive Behavior Assessment System Second Edition (ABAS-II) scores.
Results: Sensitivity and specificity values derived here were lower than those reported by (McKenzie, et al. ). Only IQ, not adaptive/social functioning, was found to be an accurate predictor of the LDSQ score.
Conclusions: Results indicate limited validity in using (McKenzie, et al. ) proposed cut-off scores. The authors have expressed caution around using the LDSQ in isolation to identify those with an intellectual disability.
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