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Industrial and Organizational Psychology

Wright State University

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Full-Text Articles in Social and Behavioral Sciences

Establishing Roots Before Branching Out: Parameter Recovery In Item Response Tree Models, Tyler Ryan Jan 2023

Establishing Roots Before Branching Out: Parameter Recovery In Item Response Tree Models, Tyler Ryan

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Item Response Trees are a type of item response model that incorporates information about conditional responding to items using a rooted tree graph structure. Researchers have used item response trees for common measurement tasks and for testing novel hypotheses. Previous simulation studies investigating item response trees either lack generalizability to the broad domain of their use or lack thorough investigation and reporting of the results. I conducted a simulation study to explore how sample size, test length, item characteristics, and tree structure affect both item and person parameter recovery for 1PL and 2PL models. The results suggested that, as with …

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The Effects Of Multicollinearity In Multilevel Models, Patrick Carl Clark Jr. Jan 2013

The Effects Of Multicollinearity In Multilevel Models, Patrick Carl Clark Jr.

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This study examined a method for calculating the impact of multicollinearity on multilevel modeling. The major research questions concerned a) how the simulation design factors affect (multilevel variance inflation factor) MVIF, b) how MVIF affects standard errors of regression coefficients, and c) how MVIF affects significance of regression coefficients. Monte Carlo simulations were conducted to address these questions. Predictor relationships were manipulated in order to simulate multicollinearity. Findings indicate that a) increases in relationships among Level 1 predictors and also relationships among Level 2 predictors led to increased MVIF for those specific variables, b) as MVIF increases for a predictor, …

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