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Schizophrenia impairs body language comprehension

ial situations," Paradiso added.

The study used innovative techniques, selected by the team and implemented by Bigelow and Andreasen, to test the study participants' reactions to human posture and movement. Bigelow, a former UI fellow in psychiatry, is now a clinical neuropsychologist at the Indianapolis Community North Hospital, and Andreasen is the Andrew H. Woods Chair of Psychiatry at the UI.

In one test, participants watched a video of human bodies in motion. The images were manipulated so that no facial features or body shapes could be seen. Instead, only points of light, attached to the joints of the people on the tape, were visible as they moved. Based on the speed and pattern of the bright dots, individuals without schizophrenia and healthy volunteers were asked to determine if the motion depicted joy or sadness, for example. The study found that individuals with schizophrenia could not accurately decipher these emotions.

Study participants also viewed still film clips of complex social scenes in which the actors' faces were erased. The participants then viewed the same clips with the faces reinstated. People with schizophrenia did not improve their performances in identifying the overall mood of the people in the scene.

"The film clip test showed that patients with schizophrenia have problems with both taking advantage of extra information that is conveyed by the human face and with deciphering socially relevant stimuli that are not conveyed by facial expression," Paradiso said.

Whether people with schizophrenia can learn to perceive body posture and other social clues has not been studied in detail. Paradiso said the question is an important one to be examined at a neuroscientific level -- to see whether, with adequate rehabilitation, regions of the brain can take over and support social perception abilities.

"The idea of other circuits taking over the brain for specific mental capacities is not
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