The Psychology Research Experience Program (PREP: https://psych.wisc.edu/nsf-reu-site-psychology-research-experience-program/) at the University of Wisconsin-Madison provides intensive mentoring and experience in scientific research and professional development to undergraduates from historically underrepresented populations — those from underrepresented racial and ethnic groups, those from low-income backgrounds, those with disabilities, and first-generation college students — who have expressed and demonstrated an interest in a career in scientific psychology. PREP features a balance of mentored laboratory research (approximately 30 hours/week) and a curriculum of scientific instruction, professional development and networking opportunities. PREP is funded by the National Science Foundation and sponsored by the University of Wisconsin-Madison.