“…To shift mental sets or see something from different perspectives, you need to activate and maintain a new set or perspective in working memory and you need to inhibit the set or perspective that was just being used. Thus, cognitive flexibility (also called set shifting), the third core EF, builds upon and requires working memory and inhibitory control (Diamond, 2010;Morasch, Raj, & Bell, 2013; see Figure 1.1). Whereas factor analyses of EFs in adults routinely come up with three factors (working memory, inhibitory control, and cognitive flexibility; Lehto, Juujärvi, Kooistra, & Pulkkinen, 2003;Miyake et al, 2000), factor analyses with children are more likely to find only two factors (working memory and inhibitory control; Hughes, Ensor, Wilson, & Graham, 2009;St Clair-Thompson & Gathercole, 2006;Wiebe et al, 2011).…”