This isn't any easier to deal with online either. Had a group project with a group of full time students while I was working, put in the time during breaks and lunches to ask what needed to be done (since the rest of the group had already spoken and divvied the assignment). Silence. Asked again when I get home. Silence. Check the next morning and two of the team had started and finished a conversation about the assignment and how lazy everyone was and how they were just going to finish it together over email/IM (which I'd provided on my end). Half that course's grade was tied up in a group project I got no input on and excluded from.