“…This finding has supported the research hypothesis that a slow breathing technique, HRVB, which uses beat-by-beat heart rate feedback, can aid in depression reduction, faster extinction, and better autonomic balance. This type of biofeedback was developed by Paul Lehrer and colleagues (Gevirtz, 2000(Gevirtz, , 2013Gevirtz & Lehrer, 2003;Lehrer, Smetankin, & Potapova, 2000;Lehrer et al, 2003Lehrer et al, , 2004Lehrer et al, , 2006Lehrer, Vaschillo, & Vaschillo, 2000).…”