Along the same lines as my other question about Hogwarts sleeping arrangements, I'm wondering if it's ever been revealed who Hermione shared a dorm with. Or whether it's possible to make an educated guess.

Dorms seem to be allocated on the basis of gender, age and house. So was it a three-bed dorm shared with Lavender Brown and Parvati Patil? Or was Hermione by herself or sharing with other people?

The only instance I can think of where her quarters are mentioned are when Ron tried to run up the stairs to the girls' rooms and gets sent back down on a slide - but it doesn't mention Hermione's specific sleeping arrangements there.

Is there any canon confirmation, JKR quotes or educated guesswork which tells us who Hermione bunked with?