Richard Gevirtz, PhD, a Distinguished Professor of Psychology at the California School of Professional Psychology at Alliant International University in San Diego, has been in involved in research and clinical work in applied psychophysiology and biofeedback for the last 40 years and is a past President of the Association for Applied Psychophysiology and Biofeedback and BCIA. His primary research interests are in understanding the physiological and psychological mediators involved in disorders such as chronic muscle pain, fibromyalgia, gastrointestinal pain and trauma. He has studied applications of heart rate variability biofeedback and measurement for anxiety, pain, gastrointestinal, cardiac rehabilitation and other disorders. He is the author of many journal articles and chapters on these topics and maintains a part-time clinical practice treating patients with anxiety and stress related disorders.