Scoring in General and Mediation Analysis (SiGMA) Lab
Director: Alexis Georeson
The SiGMA lab develops, evaluates, and applies quantitative methods in two primary areas: scoring, and mediation.
We develop and evaluate ways of creating scores from psychological measures (e.g., sum scores, factor scores). We ask when simple sum scores perform adequately enough and when they materially affect reliability, validity, and interpretation, particularly when those scores are used in models such as regression models and structural equation models.
Mediation is best used with longitudinal data, but researchers do not always have access to such data. To help researchers have more confidence that their mediated effect estimates are correct, we developed a sensitivity analysis for cross-sectional mediation.