Rollin McCraty, Ph.D. Rollin McCraty, Ph.D. is Director of Research of the HeartMath Research Center at the HeartMath Institute. As a psychophysiologist, his research interests include the physiology of emotion, heart-brain communication and the global interconnectivity between people and the earth’s energetic systems. Findings from this research have been applied to the development of many educational programs and technologies to optimize individual and organizational health, performance, and quality of life. Dr. McCraty has acted as Principal Investigator in numerous studies examining the effects of emotions on heart–brain interactions and on autonomic, cardiovascular, hormonal, and immune system function, and studies to determine the benefits of self-regulation focused interventions and heart rhythm coherence feedback in diverse organizational, educational, and clinical populations. He has been featured in a number of documentary films such as I am, The Truth, The Joy of Sox movie, The Power of the Heart, Solar Revolution, The One Field, Deconstructing Sentience, and The Living Matrix among many others.