It's amazing to me how much our kids have in common here, even if some of them have different diagnoses.
As far as negative symptoms go, my son doesn't usually have the flat effect and he shows lots of emotion. Sometimes, too much - it's like he's a raw nerve sometimes. And, he can read people like a book. He might think he hears people say things they don't when he's sick, and he might misinterpret what they say when he's well from time to time, but he's a master of interpreting body language, tone of voice and facial expressions.
He does go through the periods of not taking showers/changing clothes when he's very depressed, but when she saw him he was in a stage where he'd take two baths a day & soak in the tub for hours - and, he had taken to buzzing his hair so short he was practically bald, so that gave him a cleaner look.
He had also been working on maintaining eye contact, so that was probably pretty good.
I've never really thought of social anxiety as a negative symptom. The isolating part would be, but the severe anxiety he has in public falls into the positive category in my mind.
And, I guess she might have put any lack of motivation into the depressive category if they were thinking major depression with psychosis.
The cognitive parts would be hard to categorize. I know that's a negative symptom, but he has a learning disability too that involves long-term, short-term and processing memory. That was diagnosed when he was 6/7, but I know he was born with those issues based on how he learned things from an infant on up. Some of that has gotten better, and some has stayed the same.
When he was in the hospital, he was very paranoid & delusional, and she did say that after a week on the Invega, it was like night and day for him, and it was. He's still a work in progress, but much better than he was before.