“…(2005) found that groups with leaders in a positive mood exhibited better group coordination, whereas leader negative mood was related to increased group effort, both of which are outcomes that can be viewed as determinants of group performance. However, other studies failed to establish a direct effect between leader emotional displays and work performance, both on the individual (Damen, van Knippenberg, & van Knippenberg, 2008;Van Kleef, Homan, Beersma, & van Knippenberg, 2010;Venus, Stam, & van Knippenberg, 2013) and group level (Seong & Choi, 2014).Focusing on extra-role performance, Koning and van Kleef (2015) showed that leader displays of anger (compared to displays of happiness) decrease follower willingness to engage in organisational citizenship behaviours.Investigating group-level relationships, George and Bettenhausen (1990) found that leader displays of positive emotions are positively related to group prosocial 45 behaviour, defined as behaviour that is beneficial to the person, group, or organisation at which they are directed.Recently, researchers additionally aimed to shed light on the relationship between leader displays of discrete emotions and creativity. Visser et al (2013) found leader displays of happiness to be positively related to creative performance.…”