“…Studies have shown that as well as improving feelings of increased alertness and maintaining wakefulness in those who have sleep disorders or who are sleep deprived (Caldwell, Caldwell, Smith, Alvarado, & Heintz, 2004), use of the drug can provide a variety of moderate cognitive benefits to those without illness, including improving attention, memory and executive functions (Gore, Webb, & Hermes, 2010;Müller, Steffenhagen, Regenthal, & Bublak, 2004;Pigeau et al, 1995;Repantis, Schlattmann, Laisney, & Heuser, 2010;Turner et al, 2003).…”