Individual differences and the structure of personality (e.g., intelligence, learning ability, openness to experience, and well-being) as well as the relation to educational/occupational achievements and well-being
Psychological assessment with a focus on computer-based assessment, large-scale assessment, and ambulatory assessment
Development and training of cognitive and non-cognitive personality traits.
Psychometrics and research methodology: structural equation modelling, simulation studies, concepts of validity, and open science
