| Summary: | 碩士 === 中原大學 === 心理學研究所 === 107 === Background and Purpose. Bentall and his colleagues (2001) suggested that persecutory delusion function to enhance self-evaluation and help individuals avoiding distress triggered by latent negative self- representations and the discripency of self. It has been found that persecutory delusion robustly associated with low attentional control ability and exaggerate cognitive bias. The purpose of the present study was threefold. First, it aimed to investigate the memory bias about self in schizophrenia with persecutory delusion. Second, it tried to compare the abilities of attentional control between groups. Third, it tried to examine the effects of interaction beteen attentional control and the discipency of self-representation.
Methods. Base on these purposes, the study 3 x 3 mixed design to test the self-representation in schizophrenia patients with persecutory delusion. The variable of between subjects is group (30 schizophrenia patients with persecutory delusion, 30 schizophrenia patients without persecutory delusion, and 30 healthy control) . The variable of within subjects is word valence include positive, depressive, and threatening words in self-reference judgment and incidental learning task. In self-reference judgment task, we asked subjects to choice yes/no from each word, it stand for his/herself. In self-reference incidental task, one of the process is recall stage, all of the subject needed to recall the word from the judgment task as much as possible. In the recognition task, all of the subject needed to recognized the word from the judgment task. We used the Attentional control scale to measure the abilities of attentional control between subjects. Moreover, tested the severity of paranoia from the GPTS and PANSS.
Results. Compare to the control group, the results showed that schizophrenia patients with persecutory delusion had less self-serving memory bias in all of task, it means that schizophrenia patients with persecutory delusion had negative self-representation no matter what it be, specially at the “threaten stimulation”. At the same time, we found schizophrenia patients with persecutory delusion had lower attentional control abilities. Finally, The results showed that “attentional control abilities” were the moderator betwwen the discripency of “ choiced judgment-recognition task” and the “paranoid ideation”.
Conclusions. To summarize, schizophrenia patients with persecutory delusion had less self-serving memory bias and lower abilities of attentional control abilities, and there were interaction effect between “the discripency of self-serving memory bias” and “attentional control abilities”. Theoretical and clinical implications of these results were discussed.
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