I don't know if I agree with ADD/ADHD being on the spectrum, although I've seen people with Bipolar use stimulants for depression. I don't exactly agree because it isn't a mood disorder.

I kind of agree that Schizophrenia is on the spectrum because it's essentially a person who is always in psychosis or experiences psychosis frequently. (Which can be a byproduct of mania in bipolar/schizoaffective) However, they say schizoaffective is a mood disorder + schizophrenia...so does that mean schizophrenia is without any mood issues? So they have a relatively stable mood? As they do more research they will be able to clear up questions like this.

I was only hospitalized once when I was diagnosed and may get *light* psychosis, but it has never been bad enough where I wasn't aware enough of my surroundings and I could differentiate most of my issues. I also rarely if ever get depression. I have hypomania that has bordered manic and mixed episodes when I do not take medication right. I happened to luck out and lithium keeps me fairly stable.