“…Billet, 2001;Ellström, 2001), scholars have investigated the influence of such individual differences factors as self-efficacy, learning motivation, and enjoyment of helping others, and such situational factors as peer support and work support (e.g. Lin, 2007;Levy, Cober, & Miller, 2002;Maurer, Weiss, & Barbeite, 2003;Maurer, Lippstreu, & Judge, 2008;Noe & Wilk, 1993). However, most studies have investigated the direct effects of either individual differences or situational factors on employees' professional development (Lohman, 2005;Kwakman, 2003), and studies on the interaction between these factors are lacking (Orvis & Leffler, 2011).…”