ABSTRACT
Health psychology examines the relationships between psychological factors and health, well-being, and illness. Health psychologists use the biopsychosocial model of health and illness; thus, their measures include biomarkers, psychological factors (e.g. well-being, personality, mental health, motivation), and behaviours (e.g. physical activity, substance use, sleep). Research designs in health psychology range from observational studies (including cross-sectional and longitudinal designs) to basic experimental studies to intervention and applied research with complex designs. This article provides an overview of the common measures and study designs in health psychology research. In addition, methodological issues of measurement standardisation, replication, p-hacking, and theories are discussed.
