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Item Response Theory Models for Ipsative Tests With Multidimensional Pairwise Comparison Items.

Wen-Chung Wang1, Xue-Lan Qiu1, Chia-Wen Chen1

  • 1The Education University of Hong Kong, Hong Kong.

Applied Psychological Measurement
|June 9, 2018
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Summary
This summary is machine-generated.

Forced-choice items, like multidimensional pairwise comparison (MPC) items, reduce response bias. This study introduces a Rasch ipsative model for MPC items, enabling better measurement of psychological traits.

Keywords:
Rasch modelforced-choice itemsipsative dataitem response theorypairwise comparison

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Area of Science:

  • Psychometrics
  • Psychological Measurement
  • Item Response Theory

Background:

  • Forced-choice items are gaining traction to mitigate response bias in Likert-type scales for noncognitive traits.
  • Multidimensional pairwise comparison (MPC) items are a common type of forced-choice item.
  • Developing item response theory (IRT) models for MPC items is challenging due to ipsativity.

Purpose of the Study:

  • To develop a Rasch ipsative model tailored for multidimensional pairwise comparison (MPC) items.
  • To address the identifiability issues of absolute trait scales in ipsative measurement.
  • To provide a model with desirable measurement properties for comparing psychological differentiation.

Main Methods:

  • Development of a Rasch ipsative model specifically for multidimensional pairwise comparison (MPC) items.
  • Acknowledging and addressing the non-identifiability of absolute trait scales in ipsative tests.
  • Utilizing simulation studies to evaluate parameter recovery with existing software.

Main Results:

  • The proposed Rasch ipsative model demonstrates good parameter recovery in simulations.
  • The model yields a single utility value for each statement.
  • The model facilitates comparisons of psychological differentiation within and between individuals.

Conclusions:

  • The developed Rasch ipsative model offers a viable solution for measuring noncognitive traits using MPC items.
  • This model overcomes challenges associated with ipsativity in IRT.
  • The study provides a practical application through an empirical example of an ipsative work style test.