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Contributions to Constructing Forced-Choice Questionnaires Using the Thurstonian IRT Model.

Luning Sun¹, Zijie Qin², Shan Wang²

¹The Psychometrics Centre, University of Cambridge.

Multivariate Behavioral Research

|September 30, 2023

Summary

This summary is machine-generated.

Constructing forced-choice questionnaires requires careful item selection. Matching item desirability and considering factor loadings improves score reliability, especially with unequally keyed items.

Keywords:

Forced-choice questionnaire Thurstonian IRT model social desirability

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Area of Science:

Psychological Measurement
Quantitative Psychology

Background:

Forced-choice questionnaires present items in blocks for ranking to minimize response distortions.
Block construction requires balancing item desirability and considering item-trait relationships (factor loadings).

Purpose of the Study:

To provide evidence-based recommendations for constructing optimal forced-choice item blocks.
To investigate the impact of item desirability and factor loadings on score reliability.

Main Methods:

Simulations and empirical studies using item pairs were conducted.
Analysis focused on item desirability, keying direction, and factor loading differences within blocks.

Main Results:

Maximizing within-block loading differences improves score reliability when items are keyed in the same direction.
Including a small number of unequally keyed item pairs further enhances reliability.

Conclusions:

Optimal forced-choice block construction involves matching item desirability and carefully considering factor loadings.
Strategic inclusion of unequally keyed items can significantly boost the reliability of forced-choice measures.