This study was conducted to investigate the attention span of positive and negative schizophrenic patients. The subjects of consisted of 3 groups * 32 positive schizophrenics, 32 negative shiczophrenics and 32 normal controls. Stroop Color Word Test were adminstered to each group after they were evaluated according to age, educational level, duration of current admission, information scores of KWIS, daily dose of antipsychotics, and state-trait anxiety scores of Spielberger.
The results were as follows ;
1) For the word card, the reaction time was significantly different between the schizophrenic group and normal group(Pgroup and normal(P〈0.05). But, there was no significant difference between the two schizophrenic groups in reaction time and number of errors, and between the negative schizophrenic group and control group in number of errors.
2) For the color card, the reaction time was significantly different between the schizophrenic group and normal group(P〈0.01)，and among the three groups(P<0.05). The number of errors were significantly different among the three groups(P <0.0l).
3) For the attention to word on incongruent color-word card, the reaction time and number of errors were significantly different between the two schizophrenic groups and normal group (P〈.01)，but there was no significant difference between the positive and negative schizophrenic group in reaction time, and the negative schizophrenic group have significantly more number of errors than the positive schizophrenic group and control group.
4) For the attention to color on incongruent color-word card, the reaction time was significantly different among the three groups(P<0.01), and the number of errors were significantly different between the positive and negative schizophrenic group, and between control group and the negative group(P<0.01)
5) In relative comparision, there were significantly longer reaction time and more errors
in the negative than in the positive schizophrenic group to attention to color on incongruent
color-word card than to the attention to word on same card(P<.01).
6) In relative comparision, there were significantly longer reaction time and more errors in the negative than in the positibe schizophrenic group at to the attention to color on incongruent color-word card than to the color card(P<.01)
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