We see a psychologist for kids to help one of ours with mild anxiety.
Habits can be associated with anxiety (and OCD, which is related to anxiety) - so I guess I'd be interested to know if it's related to ODD or more of an OCD/anxiety thing.
I know it sounds gross (to pee in one's room) but there are some unusual habits out there that people do to relieve anxiety. Picking toenails, chewing them, pulling out hair, cutting .. peeing in a cup may be one?
Or is she doing it just to be defiant? The throwing it out the window - is this so you won't find out?
My friend's son had ADHD and before he was diagnosed with another condition, he used to wet himself quite often (*I think it's something like 4 times more common with kids with ADHD to wet themselves). For a while, they made a big deal about it (the school, etc.) and it becomes a 'thing' and I think he was ashamed. He wouldn't tell his parents when he went. My friend would get upset to find wet clothes hidden.
I just wonder if there's more to it .. he was so busy/preoccupied, he didn't always know to use the washroom. He was still wetting himself at older than your daughter's age.
ETA - just curious - does she say why she's doing it?
** Suz makes good point, multiple psychiatrists? What have they suggested other than it is 'wrong' to do? Do they not have strategies? That seems odd to me. For our child's mild anxiety, we were given detailed plans and techniques - parents and child. Then we met separately and together.
With regard to the neighbors, I'm sure they have no idea what she's throwing out the window (what the liquid is). I certainly wouldn't jump to the conclusion that it was urine. I would let that go.
*** I like what Robin wrote. That sounds like my friend's son with ADHD - he would get focused on playing/at school and then be too late to make it to the washroom in time. Think of a toddler training - they know but can't run to get there (may be why she wants cup in room - if she's so engrossed in her play).
Or like Robin mentions, if it's just at home I think maybe it's a place where she has control - again, this could be the anxiety kicking in - some kids with anxiety have it become a bit like OCD behaviors (habits, routines) around puberty. They feel in 'control' of things to help with their anxiety. The psychologists should pick up on this. Some kids develop eating disorders for control (again, a bit OCD like) not necessarily because they feel they have weight issues, but because it's the one thing they feel they can control - a bodily function may be where your daughter is at at 10. Just a thought.