Research Articles

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Total: 7,328 articles • Showing 2 of 7,328
pubmed

Estimating Trends With Differential Item Functioning: A Comparison of Five IRT-Based Approaches.

Engels O; Lüdtke O; Robitzsch A

This study looks at how to measure changes over time using different ways. It tries five different methods to see which one works best for finding trends. They found that the regularized estimation with SBIC method was the most accurate, while two other methods didn't do as well.

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pubmed

Discriminating Between Attribute, Item-Position, and Wording Effects by the Congeneric and Tau-Equivalent Confirmatory Factor Analysis Models.

Schweizer K; Ren X; Wang T

The study looked at different ways to see if effects like the order of items or how they are worded affect survey data. They found that one model (the tau-equivalent) could tell when these effects changed how the data fit, while another model (the congeneric) could not. They suggest checking data for these effects before analyzing it.

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