To elucidate the relationship between course and disorders of information processing (selective attention and thought) in schizophrenics, we analyzed the data of 20 chronic schizophrenics, 7 reccurent schizophrenics, and 8/normal controls.
Subjects were tested on dichotic listening tasks in which continuos prose messages and obstacle sounds or competing messages were presented, or binaural listening tasks in which pairs of prose messages were presented. Subjects were required to shadow one passage and ignore the other or obstacle sound.
The results were interprered within the framework of Broadbent's model of information processing supported by Pribram's concept of "Plan".
The results obtained were summarized as follows.
1. Chronic schizophrenics had defects at Stimulus Set, Response Set, and Plan. On the other hand, reccurent schizophrenics had defect only at Response Set.
By these results we comfirmed that primary defect in schizophrenics were Response Set.
2. Chronic schizophrenics recalled generally less and more segmentary than reccurent schizophrenics. The correct recall was significantly chronic schizophrenics less than normal controls in the absence of obstacle sounds or competing messages. But in the presence of obstacle sounds or competing message chronic schizophrenics made wrong recall more than normal controls.
On the other hand, reccurent schizophrenics made recall as well as normal controls, whether obstacle sounds or competing messages were present or absent.
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