Students with disabilities tend to persist in science, mathematics, and engineering majors.
Seymour & Hunter (1998) interviewed 60 graduates and undergraduates with disabilities who were majoring in science, mathematics and engineering (SME) at the University of Minnesota. Based on this study and previous research, they concluded that SME undergraduates were more likely to persist in their majors despite barriers which students without disabilities did not have to overcome. They attributed the students' persistence to a high degree of commitment to their majors, strong intrinsic interest in their chosen disciplines and careers, and a high degree of clarity about what they want to accomplish and why.
Seymour, E. & Hunter, A. (1998). Talking about disability: The education and work experience of graduates and undergraduates with disabilities in science, mathematics and engineering majors. Boulder, CO: University of Colorado.