Her research examines (1) the link between individual differences (vocational interests and personality in particular), person-environment fit, and career success, especially for the STEM fields (science, technology, engineering, and mathematics); (2) gendered career paths and the underlying psychological mechanisms; and (3) well-being (broadly defined) and health. Su’s research employs a variety of analytical approaches, such as structural equation modeling, multilevel and longitudinal models, meta-analysis, psychometrics, multi-dimensional scaling, and response surface techniques.