I've been doing research in a lab at my school for the past two semesters, and I like the research I do. Since I will be living near my school this summer for taking a MCAT prep course and will have most mornings free, I've asked my PI if I can work in lab over the summer part-time, and he has agreed. However, I haven't mentioned anything about getting paid, and my PI hasn't either...Rent is expensive, not to mention the MCAT course is expensive too, so I'd like to be compensated a little for my work in lab this summer. Is it bad etiquette or would it give a bad impression if I asked my PI if he will pay me? I qualify for work-study so maybe that will make it easier? I've been in this lab for a while now and my PI likes me because I've done well in his lab these past two semesters.