“…It is yet unclear when and under which circumstances WM training elicits far transfer effects, as the mechanisms underlying potential transfer effects have been largely neglected in much of past research (cf. von Bastian & Oberauer, 2014; for notable exceptions, see Gibson, Gondoli, Johnson, Steeger, & Morrissey, 2012; Hussey et al, 2016; Lilienthal, Tamez, Shelton, Myerson, & Hale, 2013; Ralph et al, 2017; Waris, Soveri, & Laine, 2015). Moreover, any meta-analytic findings must be interpreted with caution, as they are based on studies that often suffered from methodological issues such as evaluating WM training effects relative to no-contact control groups, using single transfer measures, or low statistical power (cf.…”