| Summary: | 碩士 === 國立成功大學 === 心理學系認知科學碩士班 === 101 === In the present study, we used the flanker task and the event-related brain potential (ERP) recording technique to explore the effect of sleep fragmentation on error monitoring, including error detection (indicated by the ERP component, error-related negativity, ERN), error awareness (reflected by the ERP component, error positivity, Pe) and post-error behavioral adjustments. A total of fourteen participants (seven women, seven men) with age ranging from 20-23 years completed the experiment. All participants performed an arrow version of flanker task and underwent electroencephalographic (EEG) recordings after a low sleep fragmentation (LSF) night and a high sleep fragmentation (HSF) night. The behavioral data show: HSF reduced post-error behavioral adjustments. The ERP data show: the amplitude of the Pe was significantly reduced following HSF night, but the ERN amplitude was not significantly changed. The amount of N1 sleep and arousal differences between the two sleep fragmentation conditions was negatively correlated with Pe amplitude differences, i.e., the more N1 sleep and arousal increased in the HSF night, the more Pe amplitude was reduced. By contrast, the amount of N3 sleep differences between the two sleep fragmentation conditions was positively correlated with Pe amplitude differences, i.e., the more N3 sleep was decreased in the HSF night, the more Pe amplitude was reduced. Taken together, these results suggest that sleep fragmentation weakened error awareness and post-error behavioral adjustments and these effects might be related to changes in sleep structure. Further researches are needed to verify which sleep stages are functionally related to error monitoring.
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