A corollary of this is that, to be effective, leaders need to manage emotional contagion, lest it spirals out of control. In this regard, Ashkanasy & Humphrey (2011a, p. 363) argue that leaders need to practice “leading with emotional labor” as a means of regulating their own emotional feelings. Thus, effective leaders engage in genuine emotional expression or (at least) deep acting to model the emotions suited to a particular situation; this emotion is then likely to be picked up by group members (via contagion), leading to the whole team adopting the (appropriate) emotion (Dasborough et al. 2009, Tee et al. 2013).