“…The Trail Making Test (TMT) (Reitan, 1955;Reitan & Wolfson, 2001) is a brief, easily administered, and inexpensive screening tool consisting of two conditions: Trail Making Part A (TMT-A) and Trail Making Part B (TMT-B). TMT-B has been frequently used as an index of cognitive flexibility or set-shifting, an important aspect of executive attention control (Arbuthnott & Frank, 2000;Horton, 1979;Kortte, Horner, & Windham, 2002;Moll, Oliveira-Souza Rd, Moll, Bramati, & Andreiuolo, 2002). The TMT has been demonstrated to be sensitive to cognitive impairment in a range of agerelated clinical conditions, including Parkinson disease (Goldman, Baty, Buckles, Sahrmann, & Morris, 1998;Pillon et al, 1995), Alzheimer's disease (Chen et al, 2000(Chen et al, , 2001, and other dementias (Hestad, Aukrust, Ellertsen, & Klove, 1996;Heun, Papassotiropoulos, & Jennssen, 1998;Lunn et al, 1991;Paul et al, 2001;Selnes et al, 1991).…”