“…Whilst the short-term stability (e.g., test-re-test reliability) of heartbeat counting is likely a product of the reliability of the task, long-term stability presumably captures both the reliability of the task and the extent to which heartbeat counting is an enduring trait. Over the short-term (e.g., < 6 months), estimates of the stability of heartbeat counting performance in adulthood range from approximately r = ∼.41 to .81 depending on the time period examined, intervention (e.g., meditative training) and participant group employed (e.g., Ehlers, Breuer, Dohn, & Fiegenbaum, 1995;Ferentzi, Drew, Tihanyi, & Köteles, 2018;Herbert, Herbert, & Pollatos, 2011;Mussgay, Klinkenberg, & Rüddel, 1999;Parkin et al, 2014;Wittkamp, Bertsch, Vögele, & Schulz, 2018; for an overview see Ferentzi et al, 2018). In contrast, few studies have examined the stability of heartbeat counting across long time periods (e.g., > 6 months).…”