“…Depression has received the majority of the attention (Butterfield, Cimino, Oelke, Hauser, & Sanchez-Ramos, 2010;Gass & Russell, 1986;Hammar, Strand, Ardal, Schmid, Lund, & Elliott, 2011;Kinsinger, Lattie, & Mohr, 2010;Rapp et al, 2011;Sweet, Newman, & Bell, 1992;Walker & Steffens, 2010). Anxiety has also been a common research focus (Beaudreau & O'Hara, 2008;Birnbaum & Pinku, 1997;Castaneda, Tulio-Henriksson, Marttunen, Suvisaari, & Lonnqvist, 2008;Gass & Curiel, 2011;Hopko, Crittendon, Grant, & Wilson, 2005;Rozzini et al, 2009;Vestberg, Passant, Risberg, & Elfgren, 2007). A major problem with this line of investigation has been a failure to control for consistency of positive effort or task engagement as objectively determined by performance validity measures.…”