dr. steven hyman is the director of the stanley center for psychiatric research at the broad institute of.i.t. and harvard. his center was involved in this study. i spoke with him yesterday. dr. steven hyman, welcome to the "newshour". first of all, tell us what it is like to have schizophrenia. we know that something like 3 million americans suffer from this. >> that's right, it affects about 1% of people worldwide, including the united states, and what patients experience is extremely distressing and also disabling. there are three kinds of symptoms, most famously people have what are called psychotic symptoms -- hallucinations, most often hearing voices that aren't there, dilutions which are fixed, nails beliefs that are not culturally appropriate, but also less well recognized are two other symptoms which contribute to disability. people have declines in their cognitive functions -- things like memory, about the pay attention, and ability to use their thoughts to control their emotions and behavior. then there's another symptoms called deficit symptoms where people have blunted affect