I'm still working my way through this thread, but I thought I'd introduce myself and also ask a question.

I discovered UP when my DS4 was a baby. I actually read the book during his naps, when he was asleep on my chest in the sling. It totally and completely resonated with me. I started to really understand the affect my own childhood had on me (I had a VERY authoritarian mom and dad who parented conditionally, and I've dealt with issues of needing people to like me, insecurity, not knowing how to make my own decisions, etc. my whole life) and how I would rather parent my own child.
So it's all good, right? I got DH to watch the DVD (because there's no way he would read an entire parenting book) and he's even commented on how annoying it is to hear other parents tell their kids "Good job!" But he does have his doubts sometimes, particularly since he has three much older kids from his first marriage who were parented more traditionally (though still much more respectfully than I was parented).
It's tough when issues come up that make DH doubt UP and put me in a position to defend it, when *I'm* having doubts myself and often feel like I'm making this up as I go along, despite Kohn's philosophy. Here's the problem we're currently dealing with:
My son has always been VERY attached and needy in that he has always needed our constant attention. He's essentially an only child and I'm home full-time, so I guess that's not too surprising. But he's always been very sweet and gentle...until he turned four.
Whoo boy. He started hitting and attacking us, to the point that I'd have to wrestle away from him and lock myself in the bathroom. I tried restraining him, holding him and comforting him, but that NEVER seemed to do anything but escalate things.
After a little while (a month or so later) he stopped hitting. He would start to say, "If you don't do such-and-such I'm going to HIT you!" but he wouldn't actually hit. Then when I would say that hitting is not the way to express frustration, etc., he would say, "I wasn't going to actually hit you, I just wanted it to sound bad." Occasionally he would start to say, "I'm going to h--" and then I could hear him correct himself.
But then he started hitting again. It sort of goes in spurts. It hasn't been as bad as when he first turned four (he's four years and almost five months) but he'll still hit us. Sometimes he runs away after hitting us and it's like he's trying to provoke a reaction. I've asked him why he hits, and he says "it's a secret." He won't talk about why he hit in a particular situation, even though it's clearly because he's upset/angry/frustrated. I've tried to give him things to say instead of hitting.
It's SO frustrating for us. What should we do?