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Computerized Adaptive Testing System of Functional Assessment of Stroke

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Linking self-perceived cognitive functioning questionnaires using item response theory: The subjective cognitive

Laura A Rabin¹, Sietske A M Sikkes², Douglas Tommet³

¹Department of Psychology, Brooklyn College, City University of New York.

Neuropsychology

|June 5, 2023

Summary

This study harmonized self-perceived cognitive functioning questionnaires from international aging studies. Linking these measures allows for consistent comparisons and the development of new, psychometrically sound cognitive assessment tools.

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Area of Science:

Gerontology
Cognitive Science
Psychometrics

Background:

Self-perceived cognitive functioning is crucial for understanding aging and dementia.
Existing assessment methods vary widely, hindering cross-study comparisons.

Purpose of the Study:

To link item-level self-report questionnaire data from international aging studies.
To create a common metric for self-perceived cognitive functioning.

Main Methods:

Harmonized data from 24 studies and 40 questionnaires using item response theory (IRT).
Employed a Bayesian estimator with a graded response model.
Included data from 53,030 neuropsychologically intact older adults.

Main Results:

Successfully linked all questionnaires, supporting a single-factor structure for the latent trait.
Identified 'top items' assessing memory, executive functioning, attention, language, calculation, and visuospatial skills.
These high-precision items came from diverse questionnaires and formats.

Conclusions:

First study to calibrate self-perceived cognitive functioning data across diverse global older adults.
Resulting item scores on the same metric enable pooled analyses.
Findings may inform the development of new, psychometrically validated cognitive questionnaires.