Dr. Andrea Patey is a Senior Research Associate within the Centre for Implementation Research at the Ottawa Hospital Research Institute and an Adjunct Professor at School of Epidemiology and Public Health, University of Ottawa and School of Rehabilitation Therapy, Queen’s University, in Canada. She is Co-Lead of the Implementation and Research Platform at Choosing Wisely Canada and Co-Director of the Healthcare Improvement Fellowship at the Centre for Quality Improvement and Patient Safety/Choosing Wisely Canada. She holds a PhD in Health Psychology from City, University of London. Her research sits at the intersection of behaviour sciences and implementation research applying psychological theory and methods to explain and change health professional behaviours across a range of clinical settings. Andrea’s specific interest centres around whether implementation (starting an evidence-based clinical practice behaviour) and de-implementation (stopping an ineffective or harmful clinical practice behaviour) differ, and correspondingly, whether interventions to target each should also differ. The broad objectives of her research are to promote the use of theory and rigorous methods to improve the delivery of evidence-based healthcare through the development and evaluation of complex behaviour change interventions.