⁸On the general idea of extinction by mindfulness and exposure, see (Baer, 2003; Hölzel et al., 2011); on relaxation and positive affect, (Carmody, 2015). An interesting question here is whether extinction needs attention and/or awareness, and would thus be greatly facilitated by mindfulness; the results are not very clear-cut on this point (Kwapis et al., 2015; Han et al., 2003; Weike et al., 2007).