Effects of positive and negative delusional ideation on memory

[Speaker] Sugimori, Eriko:1
1:Waseda University, Faculty of Human Sciences (Japan)

In this study, we investigated the relationship between levels of delusional ideation and the activation and distortion of memory by using pairs of positive and negative adjectives describing personality traits where those adjectives had similar meanings. We presented one of each pair of adjectives in the learning phase. Immediately after the learning phase in Experiment 1, we asked whether each adjective had been presented. Participants with high delusional ideation were more likely to indicate that they had learned adjectives that they had not actually learned. However, in Experiment 2, two forced-choice tests were conducted immediately after the learning phase. In this context, participants, regardless of their proneness to delusional ideation, could almost always correctly distinguish what had and had not been presented. As time passed, the proportion of false alarms for positive or negative adjectives was higher in the two forced-choice tests among those with high proneness to delusional ideation.
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