“…In particular, PD patients have problems with planning (Johnson et al, 2005;Lewis et al, 2003;Owen et al, 1995), prospective memory (Kliegel et al, 2005), working memory (Dagher et al, 2001;Lewis et al, 2005) and setshifting (Cools et al, 2001;Gauntlett-Gilbert et al, 1999;Woodward et al, 2002). These deficits have been demonstrated using a wide variety of tasks, a common one being the Tower of London along with adaptations and expansions of it that included novel conditions (Culbertson et al, 2004;Dagher et al, 2001;Owen et al, 1995).…”