Phrases seem disconnected, and ideas move from topic to topic with no logical pattern in what is being said. In some cases, individuals with schizophrenia say that they have no idea at all or that their heads seem "empty". Many schizophrenic patients think they possess extraordinary powers such as x-ray vision or super strength. They may believe that their thoughts are being controlled by others or that everyone knows what they are thinking. These beliefs are caused by delusions. "Most specialists agree that symptoms are provoked by chemical disturbances of the brain, but no exact mechanism is known" (Mueser, 102). Those with schizophrenia regularly report unusual sensory experiences, especially when the illness is in an acute stage. Often these experiences are in the form of hearing voices. Persons may hear one or two voices making comments on their behavior. They may not know the voice, or they may believe it is the voice of God, the Devil, or a friend. When the voice issues orders to behave in a particular way, the experience is known as a command hallucination. "These hallucinations can be very dangerous to the sufferer and others. .
When the voice commands the person to do something, the schizophrenic person will perform that task as instructed" (Kass, 188). Particular, repetitive movements sometimes are seen in schizophrenics. Victims might swing one leg back and forth all day, or constantly shake their heads. Catatonic behavior is another symptom; a victim might keep the same position for hours, unable to talk or eat. Catatonic schizophrenia is marked by striking motor behavior. "Some victims may be overly intrusive, constantly prying into the affairs of those around them" (Gingerich, 64). When compared to other people in general, those with schizophrenia are less likely to marry or remain married; more likely to have school problems; often unable to keep their jobs; more prone to suicide attempts.