Being told what is coming next and being able to go see is another. With children with autism, etc. they like to have a picture clue chart that shows the order for the day and it can often be an event far down the list the child has issues with that is throwing off everything else. Instead of enjoying the moment they are worried all morning about wanting juice at lunch instead of milk or that you might serve a food she doesn't really like.

It could also be that discipline was harsh at her previous daycare. She is afraid to pee her pants so at even the slightest inkling that she might have to pee and we all know whenever we think about needing to pee that we do need to pee - or piddle as the case may be then she will go do it.

Another reason I like pullups is to prevent the power control that having to go potty gives to a child. If you can't hold it till the next potty break then you aren't trained - they are sent before the next event not during.