While schizophrenia is best known for episodes of psychosis - a break with reality during which an individual may experience delusions and hallucinations - it is also marked by chronic neurocognitive deficits, such as problems with memory and attention. A multi-site cognition study led by psychologists at Beth Israel Deaconess Medical Center (BIDMC) found that these neurocognitive symptoms are evident prior to the onset of psychosis in a high-risk stage of the disorder called the prodromal phase.
Schizophrenia "conjures up dread" in our culture, Seidman said, but he notes that it is likely these cognitive deficits - not the delusions and hallucinations people fear so much - that keep roughly 80 percent of people with schizophrenia out of work or school. Recent focus on the prodromal period and the growing promise of early intervention is giving patients and their families more realistic hope that better outcomes are possible, he added.
"People can hear voices and still function pretty well, but they basically cannot function at all when their cognition is impaired," he said.
http://www.news-medical.net/news/201611 ... renia.aspx
in other words memory and attention problems are seen before psychosis and can be
warning signs. I think its called Disorganized Thinking?