The Meyerhoff Scholarship Program, which celebrated its 20th year in 2008, is considered a successful intervention program for increasing the number of underrepresented minorities who earn Ph.D.s or M.D./Ph.D.s and pursue research careers in science, technology, engineering, and mathematics (STEM). This article examines the relationship between participation in one specific component of the Meyerhoff Scholarship Program--on-campus, academic year research--and the pursuit of a STEM Ph.D. by 13 cohorts of program participants. The results indicate that participation in on-campus, academic year research is associated with a substantial increase in the probability of pursuing a STEM Ph.D. They further suggest that the structure and intensity of the on-campus, academic year research experience matter. (Contains 5 notes, 6 tables, and 1 figure.)