Ruth Baer is a clinical psychologist and Professor of Psychology at the University of Kentucky. She conducts research on mindfulness and teaches and supervises several empirically supported mindfulness-based interventions. She has developed two self-report instruments for measuring mindfulness as a psychological variable, edited three books for professionals on mindfulness-based treatments and their mechanisms of change, and written a book about mindfulness for the general public titled Practising Happiness. Her many peer-reviewed articles address a variety of mindfulness-related topics. Her most recent work considers a variety of ethical issues in mindfulness-based interventions.