... Many authors highlighted the use of goal-setting to better motivate participants to engage with mindfulness (n=23, 36% of studies (Bach & Hayes, 2002;Bacon et al., 2014;Chadwick et al., 2016;Chadwick et al., 2005;Dannahy et al., 2011;Davis, 2014;Dennick et al., 2013;Gaudiano & Herbert, 2006;Gumley et al., 2017;Jacobsen et al., 2020;Jansen & Morris, 2017;Johns et al., 2016;Khoury et al., 2015;Lam et al., 2020;Miller, 2011;Randal et al., 2016;Shawyer et al., 2012;Sheets, 2009;Spidel et al., 2018;van der Valk et al., 2013;Veiga-Martínez et al., 2008;Wang et al., 2016;White et al., 2011)). Some authors endorsed longerinterventions to better consolidate practice (n=12, 21% of studies; (Bach et al., 2012;Braehler et al., 2013;Brown et al., 2010;Chadwick et al., 2016;Chien et al., 2017;Davis, 2014;Davis et al., 2007;Davis et al., 2015;Miller, 2011;Shawyer et al., 2017;Spidel et al., 2018)), for example, 20 weeks (Brown et al., 2010), or a twice repeated 32-week curriculum (Davis et al., 2015). ...