flexibility, dominance, honesty/integrity, self-confidence, creativity, and charisma were strongly correlated with leader effectiveness. Additionally, he found that the proximal individual differences of interpersonal skills, oral communication, written communication, management skills, problem solving skills, and decision making were also strongly correlated with leader effectiveness. His results suggested that on average, distal and proximal individual differences have a similar relationship with effective leadership (Hoffman et al., 2011). Trait-leadership model Zaccaro and colleagues (2004) created a model to understand leader traits and their influence on leader effectiveness/performance. This model, shown in the figure below, is based on other models of leader traits and leader effectiveness/performance (Mumford, Zaccaro, Harding, Fleishman, & Reiter-Palmon, 1993; Mumford, Zaccaro, Harding, et al., 2000) and rests on two basic premises about leader traits. The first premise is that leadership emerges from the combined influence of multiple traits as opposed to emerging from the independent assessment of traits. Zaccaro (2001) argued that effective leadership is derived from an integrated set of cognitive abilities, social capabilities, and dispositional tendencies, with each set of traits adding to the influence of the other. The second premise is that leader traits differ in their proximal influence on leadership. This model is a multistage one in which certain distal attributes (i.e. dispositional attributes, cognitive abilities, and motives/values) serve as precursors for the development of proximal personal characteristics (i.e. social skills, problem solving skills and expertise knowledge) (Ackerman & Humphreys, 1990; Barrick, Mitchell, & Stewart, 2003; Chen, Gully, Whiteman, & Kilcullen, 2000; Schneider, Hough, & Dunnette, 1996; Kanfer, 1990, 1992; Mumford, Zaccaro, Harding, et al., 2000). Adopting this categorization approach and based on several comprehensive reviews/meta-analysis of trait leadership in recent years (Derue et al., 2011; Hoffman et al., 2010; Judge et al., 2009; Zaccaro, 2007), we tried to make an inclusive list of leader traits (Table 1). However, the investigations of leader traits are always by no means exhaustive (Zaccaro, 2007). Other models of trait leadership Multiple models have been proposed to explain the relationship of traits to leader effectiveness. Recently, integrated trait leadership models were put forward by summarizing the historical findings and reconciling the conflict between traits and other factors such as situations in determining effective leadership (Derue et al., 2011; Judge et al., 2009; Zaccaro, 2007). In addition to Zaccaro's Model of Leader Attributes and Leader Performance described in the previous section, two other models have emerged in recent trait leadership literature.