He conducts research in the area of environmental psychology. This work focuses on understanding psychological factors that underlie environmental problems such as resource over-consumption, global warming, and air pollution. He is particularly interested in identifying strategies to help people change their destructive patterns of behaviour into more environmentally sustainable ones. He has also conducted numerous studies on cognitive factors (expectancies, mental models, risk perceptions) that guide decisions related to aggression, smoking, alcohol use, and anti-poverty activism. He is particularly interested in dual process models that suggest human behaviour is controlled by two distinct information-processing systems: (1) an experiential system that is predominantly preconscious, automatic, and driven by emotion, and (2) a rational system that is conscious, effortful and logic-based.