“…More recently, it has been used as a screening method for cognitive impairment (Shulman, 2000), especially in the elderly (Nishiwaki et al, 2004). Patients with dementia of the Alzheimer's type (Bozikas et al, 2003;Freedman et al, 1994;Heinik, Solomesh, Raikher, & Lin, 2002;Libon, Swenson, Barnoski, & Sands, 1993;Rouleau, Salmon, & Butters, 1996;Rouleau, Salmon, Butters, Kennedy, & McGuire, 1992), Huntington's disease (Rouleau et al, 1992), Parkinson's disease (Freedman et al, 1994), vascular disease (Heinik et al, 2002), schizophrenia (Bozikas et al, 2004;Bozikas et al, 2003;Herrman et al, 1999), stroke (Lieberman et al, 1999), and visuo-spatial neglect (Di Pellegrino, 1995) have all demonstrated significant impairment on the CDT.…”