“…Rather, as previously suggested by others,`post-formal' intellectual development occurs, at least for some students (e.g., Perry, 1970;Arlin, 1975;Commons, Richards, & Armon, 1984;Perry, Donovan, Kelsey, Peterson, Statkiewicz, & Allen, 1986;Welfel & Davison, 1986;Castro & Fernandez, 1987;Commons & Miller, 1997;Commons, Trudeau, Stein, Richards, & Krause, 1998;Yan & Arlin, 1998). Rather, as previously suggested by others,`post-formal' intellectual development occurs, at least for some students (e.g., Perry, 1970;Arlin, 1975;Commons, Richards, & Armon, 1984;Perry, Donovan, Kelsey, Peterson, Statkiewicz, & Allen, 1986;Welfel & Davison, 1986;Castro & Fernandez, 1987;Commons & Miller, 1997;Commons, Trudeau, Stein, Richards, & Krause, 1998;Yan & Arlin, 1998).…”