Students are expected to commit a minimum of 10 hours of research per week during the school year. Students put in research time under the supervision of laboratory technicians, on a set schedule. Students also meet with advisors at a minimum of once per week, with a more rigorous schedule arranged if needed at the discretion of the research advisor.
By submitting an application, you agree that you will put in at least 10 hours of research per week for the entirety of the program. This means you cannot put in 5 hours one week and 15 hours the next week (unless there is a scientific reason, as decided by your advisor). This also means that you will use good time management skills, and put in your 10 hours of research time even if you have a busy week at school in terms of homework or exams.
Furthermore, you agree not to drop out midway through the program, because you will harm your group members by doing so. Projects are planned to be publishable through one semester's worth of work, but all members of a research group must contribute. Your peers are counting on you, and if you quit on them, their ability to publish becomes jeopardized.
The only exceptions to the above commitments are if unexpected extenuating circumstances, such as family emergencies or health problems, arise.