My 5 year old DD is the most insolent child I have ever met. She refuses at least 80% of requests, she hits, bites and pushes. She takes everything very literally; we'll be playing a game and I'll pretend to get her and she'll scream the place down and bite and hit me because she really believes I'm the bad guy I'm pretending to be. She is very clumsy and trips and falls or walks into things at least 6/7 times on every trip out.
Her speech is very very difficult to understand yet she tries taking to everyone and just keeps talking at them even when they're clearly not listening or understanding. She's under SALT but it isn't making a jot of difference. I'm having to home school her as we moved house and we're waiting for a school place (she's only just turned 5) so I can't get school input. But at home school groups she doesn't interact with the other children and just talks at the adults.
She is very impulsive and often hurts herself as a result. I think she could be showing a lot of signs of PDA but the GP dismissed it as being a normal 5 year old 