Over the summer, I visited several PIs in programs that I was interested in. When I met with them, I brought notes with bullet points of their research (that was of particular interest to me) and questions specific to their research. I found this very helpful because it allowed me to ask questions that led to great discussions of their work. These conversations, in many cases, brought their work to life for me. I am wondering if it is acceptable to do this again during my interviews - especially with faculty that I would be interested in working with. Obviously, I don't even know if I would meet with those faculty members, but if so, is it appropriate to be prepared in this way? Or should I try to just ask questions from memory? Is it acceptable to take notes when they answer my questions? What if I just want to jot down a question that comes up while they are talking, so that I don't have to interrupt their train of thought, but can ask it later?