Hmm, it was like somewhere in the late eighties, and I visited a guy who even back then was experimenting with making a computer think like a human . His programmed brain was basically running on pain feedback , as he explained it to me. And I still to this day remember my first thought when he told me that: :I think positive feedback would work better : .
Looking back I think it is the balance of both that works best, as I see my eldest daughter interact with my grandson. She focuses primarily on positive feedback , even to the point of pampering him, but he still has to learn to handle the occasional mishap like falling flat on his face if he runs too fast.