The accuracy of the Learning Disability Screening Questionnaire (LDSQ) in classifying severity of impairment: A brief report

Aja Louise Murray, Karen McKenzie

Research output: Contribution to journalArticlepeer-review

Abstract

Background
Outcomes for people with an intellectual disability (ID) may differ depending on the severity of the condition. This study evaluated whether a tool used to screen for the presence of ID could also give an early indication of severity, in order to help inform future support needs.


MethodsMulticategory receiver operating characteristic (ROC) analysis was used to examine how well the Learning Disability Screening Questionnaire (LDSQ) could classify individuals (n = 238) in terms of severity of intellectual impairment.


ResultsMean LDSQ scores increased across diagnostic categories from “severe impairment” to “no ID” as expected. However, overall classification accuracy was inadequate to justify extending the use of the scale to placing individuals in severity categories (VUS = .58 and Youden Index = .49).


ConclusionsAlthough the LDSQ can accurately discriminate between those with and without ID, results indicated that it may not accurately classify individuals in terms of severity of intellectual impairment.
Original languageEnglish
Pages (from-to)370-374
Number of pages5
JournalJournal of Intellectual and Developmental Disability
Volume39
Issue number4
Early online date16 Jul 2014
DOIs
Publication statusPublished - 2 Oct 2014

Keywords

  • Learning Disability Screening Questionnaire
  • severity
  • intellectual disability
  • ROC analysis
  • screening
  • impairment category

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