Yeah, Choice Theory was originally called Control Theory--they both refer to the same idea, however. Reality Therapy has been implemented heavily in institutional settings (prisons, hospitals, group homes, etc.) and I think the "Control" term was turn-off because it implied that the staff was using it to control the inmates/patients/residents.

I don't think that anyone--including Glasser--would argue that neurochemical imbalances don't exist. I don't think it's always so simple as "neurochemical imbalance causes mood change", though. There are instances where changes to behavior change the neurochemistry, so it can work the other way around. A lot more work needs to be done, of course, but I suspect we're going to find out that it's not the same for every problem or every person.