“…Despite the benefits of participants' use of examples on the effective acquisition of problem-solving skills (e.g., Catrambone, 1994Catrambone, , 1996Chen, 1995;Ross & Kennedy, 1990) and the wide use of pictorial examples as problem-solving aids in a variety of educational settings (e.g., Doornekamp, 2001;Lim & Moore, 2002;Noh & Scharmann, 1997), there is a relative paucity of research on the specific circumstances under which the use of examples benefits or impairs the solver's performance. Most important, very few studies in psychology (e.g., Jansson & Smith, 1991;Smith et al, 1993) have examined the cognitive mechanisms underlying possible negative transfer effects following the use of examples.…”