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Full-Text Articles in Psychology
Marginal Mediation Analysis: A New Framework For Interpretable Mediated Effects, Tyson S. Barrett
Marginal Mediation Analysis: A New Framework For Interpretable Mediated Effects, Tyson S. Barrett
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Mediation analysis is built to answer not only if one variable affects another, but how the effect takes place. However, it lacks interpretable effect size estimates in situations where the mediator (an intermediate variable) and/or the outcome is categorical or otherwise non-normally distributed. By integrating a powerful approach known as average marginal effects within mediation analysis—termed Marginal Mediation Analysis (MMA)—the issues regarding categorical mediators and/or outcomes are, in large part, resolved. This new approach allows the estimation of the indirect effects (those effects of the predictor that affect the outcome through the mediator) that are interpreted in the same way …
Latent Difference Score Mediation Analysis In Developmental Research: A Monte Carlo Study And Application, Melissa Simone
Latent Difference Score Mediation Analysis In Developmental Research: A Monte Carlo Study And Application, Melissa Simone
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Developmental and prevention researchers aim to determine how unhealthy behaviors emerge. Mediation analysis offers a statistical tool that allows researchers to describe the processes underlying early risk and later health outcomes. Among existing longitudinal mediation models, latent difference score mediation stands out due to its unique ability to capture variations in changes both within and across individuals, as well as its ability to examine non-linear change over time. However, the literature currently lacks sample size guidelines for latent difference mediation models, which has proven to make the use of these models difficult. The current project addresses this limitation by offering …