“…The SMS has to-date been studied and demonstrated reliability amongst a number of population groups: (a) college and university students (e.g.,Hussein, Egan, & Mantzios, 2017, α = .92 preand .94 post-mindfulness intervention); (b) adults and young adults from the general community (e.g.,Koval & Todaman, 2015, α = .95; Roche, Barrachina, & Fernández, 2016, α = .95); (c) meditation-naïve participants and/or experienced meditators (e.g.,Bravo, Pearson, Wilson, & Witkiewitz, 2018, SMS-Body α = .88, SMS-Mind α = .94); (d) participants engaged in mindfulness training or mindfulnessbased intervention (e.g., Calma-Birling & Gurung, 2017, SMS Total α = .94; Jislin-Goldberg,Tanay, & Bernstein, 2012, α = .92, one-month test-retest reliability r = .52, one-week test-retest reliability measured immediately following weekly mindfulness meditation sessions r = .72;Kohlenberg et al, 2015, α = .86); and (e) multiple specific population groups and sub-groups such as adults exposed to recent traumatic (e.g.,Nitzan-Assayag et al, 2017), and deprived and STATE MINDFULNESS SCALE (SMS) 11 non-deprived daily cigarette smokers (e.g.,Luberto & McLeish, 2018, α = .91 and .95, before and after a 10-minute sitting meditation exercise, respectively;Paz, Zvielli, Goldstein, & Bernstein, 2017). Importantly, as a state measure of mindfulness, it has been studied among meditation-naïve adults in the context of mindfulness meditation specifically (see above), in controlled lab settings, in response to mindfulness interventions or experimental manipulations of present moment attention and awareness (e.g.,Allirot et al, 2017; e.g., Hadash, Segev, Tanay, Goldstein, & Bernstein, 2016), as well as in daily living (e.g.,Pryss et al, 2018;Shoham et al, 2017). Notably, to the best of our knowledge, there are no published data to-date examining the performance or psychometrics of the SMS amongst children or adolescents nor amongst clinical population groups to whom mindfulness-based interventions are often delivered.Experimental Validation: Sensitivity to Change.…”