This study examines the changes in students' conceptual thinking and problem solving abilities. Conceptual thinking skills and problem solving abilities are important factors for medical school applicants as diagnosis and treatment procedures strongly depend on these skills. Underrepresented minorities in medicine is a concern in United States, and low numbers of minority students in the medical field may indicate that disadvantaged students are not successfully mastering these skills. Post baccalaureate programs may be one way of assisting these students in overcoming their deficits and make them competitive medical school applicants. The study was conducted for eight weeks among voluntary educationally disadvantaged post baccalaureate students. (Contains 35 references.) (YDS)