“…Studies in cognitive psychology have shown that the deployment of attentional resources (Kahneman, 1973;Matthews & Desmond, 1998) is determined by various external factors, such as physically (Theeuwes, 2010) and socially (West, Anderson, & Pratt, 2009) distinctive items, as well as by endogenous factors, such as intention (Hommel, 2010). Moreover, the deployment of attention can also be affected by such internal factors as motivation (Della Libera & Chelazzi, 2006) and the current mood state (Fredrickson, 2004;Friedman & Forster, 2010), because the internal states of observers can influence executive function (Ashby, Isen, & Turken, 1999), which governs the major cognitive systems, thereby including the deployment of attention.…”