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[Cognitive Reserve Questionnaire: psychometric analysis from the item response theory].

P Martino1,2, T Caycho-Rodríguez3, P D Valencia4

  • 1Consejo Nacional de Investigaciones Científicas y Técnicas de Argentina (CONICET), Rosario, Argentina.

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Summary

The Cognitive Reserve Questionnaire (CRQ) shows higher reliability for individuals with less cognitive reserve. This study validates the CRQ using item response theory and confirms its convergent validity.

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Area of Science:

  • Neuroscience
  • Psychometrics
  • Gerontology

Background:

  • Cognitive reserve (CR) enables better tolerance of brain damage via cognitive resources.
  • The Rami CRQ-Cognitive Reserve Questionnaire is a tool for assessing CR.

Purpose of the Study:

  • To analyze the informative quality of the CRQ using item response theory (IRT).
  • To provide precise data on the internal consistency reliability of the CRQ.
  • To test the convergent validity of the CRQ with attention, working memory, and fluency measures.

Main Methods:

  • Item response theory (IRT) with a graded response model was applied.
  • Discrimination (a) and difficulty (b) parameters were estimated.
  • Convergent validity was assessed using correlation analyses with cognitive tests.

Main Results:

  • IRT analysis revealed high discrimination for 'Education' and 'Occupation level' items.
  • Lower discrimination was found for 'Musical training' and 'Intellectual games' items.
  • The CRQ demonstrated greater informational value at lower levels of cognitive reserve and acceptable convergent validity with cognitive tasks.

Conclusions:

  • This is the first IRT analysis of the CRQ.
  • The CRQ is more reliable when assessing individuals with lower cognitive reserve.
  • The CRQ exhibits acceptable convergent validity.