人們對於錯誤訊息處理經由自我覺察或外在回饋之管道，可藉由事件關聯電位分別測得ERN (error-related negativity) 及FRN (feedback-related negativity)。過去研究曾指出雙側作業(Flanker task)中錯誤所引發的ERN會受到以圖片呈現的短期情緒所調節，然而對於回饋誘發的FRN與個體情緒調節的關係則未曾被探討過。過去FRN的研究認為唯有當受試者所進行的作業為增強學習作業時，受試者對於回饋結果的預期狀態才能反映於FRN的反應強度。本研究利用兩個實驗分別採用非增強學習作業及增強學習作業，其中並以IAPS情緒圖片進行短期情緒的引發，在受試者於實驗中對其反應結果的不同預期狀態，探測受試者FRN受短期情緒調節的效果。 實驗一利用非增強學習作業，結果顯示FRN的強度可以反映受試者對於回饋結果的預期狀態，其中以非預期時FRN的強度為最大，預期時FRN的強度為最小；另外，正向情緒圖片對於FRN具有調節效果，正向情緒下FRN反應強度小於中性以及負向情緒下FRN反應強度。實驗二利用增強學習作業，前述的FRN強度反映受試者對回饋結果的預期效果，只有在實驗前半段的嘗試次中被觀測到，此效果未見於全部嘗試次納入分析；另外，實驗二中沒有觀察到情緒對於FRN的調節效果。 綜合而言，本研究發現受試者唯有持續處於學習的情形下，FRN才能反映受試者對於回饋結果的預期狀態，情緒對FRN的調節效果也僅於此情況下才能被觀測到。 / Error-related information in human can be processed via self-awareness and/or feedback given externally, which are measurable by the use of event-related potential (ERP) and termed error-related negativity (ERN) and feedback-related negativity (FRN) respectively. Previous studies showed that short-term affective stimuli would modulate the magnitude of ERN elicited by Flanker task. However, such modulation effect has not been tested on FRN. Furthermore, the magnitude of FRN is indicated to be related to the expectancy states toward feedback when the subject is undergoing a reinforcement learning task. Present study, thus, was designed to test the affective modulation effect on FRN in two separate tasks. In which, emotional pictures adopted from IAPS were used as the short-term affective stimuli, and different expectancy states in both non-reinforcement learning task (Experiment1) and reinforcement learning task (Experiment 2) were manipulated. In the results of Experiment 1, the magnitude of FRN was larger under the unexpected condition in comparing to the expected one. Modulation effect of short-term affective stimuli on FRN was obtained when positive emotion pictures were presented in non-reinforcement learning task, which FRN amplitude was significantly smaller in comparing to those measured after the presentation of neutral and negative pictures. In the results of Experiment 2, FRN elicited in the unexpected condition was only obtained from analyzing the dada collected in the first half of trails. Such effect was not confirmed when the data from all trials were analyzed. A lack of modulation effect of short-term affective stimuli on FRN appeared in Experiment 2. In conclusion, it is indicated that the expectancy depended FRN is most apparent when the subject is undergoing a continuous learning-demanded process. Meanwhile, short-term affective stimuli can modulate such FRN.

本研究包含兩個實驗，分別在再認作業的學習及測驗階段呈現選自國際情緒圖片系統（IAPS）的情緒性及非情緒性圖片作為情境操弄，進而了解情緒性情境對記憶歷程中，入碼及提取階段的影響。行為資料、腦電波相關電位及情緒的生理反應指標皆收集用作分析。實驗一中，中性及負向圖片在記憶目標字出現之前呈現，藉以操弄受試者記憶入碼的情緒狀態。行為結果並未顯示情緒效果，表示入碼的情緒情境不能影響記憶的正確率。事件相關腦電位的資料亦沒有在記憶相關的效果顯現情緒圖片的影響。實驗二中，中性及負向的圖片在提取階段呈現於目標字之前，藉以影響受是者記憶提取時的情緒狀態。相似於實驗一的結果，受試者的行為表現並未受情緒圖片的影響。但在事件相關電位方面，300至500毫秒間，靠近中間前腦區的新舊效果受到情緒的影響。觀看負向圖片後，受試者記憶提取時的新舊效果消失。此結果指出記憶提取時的情緒情境可能造成提取的認知歷程的改變。 / In two experiments, emotional or non-emotional pictures chosen from the IAPS (International Affective Pictures System) were presented before target words in the study phase or test phase of a recognition task to examine the effect of emotional context on memory encoding and retrieval. Behavioral data, ERP (Event-Related Potential) and physical indicators were adopted. In experiment one; neutral or negative pictures were presented before target in study phase in order to modify the emotional state of encoding. Behavioral data showed no emotional effect. Emotion of encoding context did not affect memory in accuracy. ERP data did not show a significant emotional effect on memory related components. In experiment two, pictures were presented before retrieval to modulate the emotional states during memory retrieving. Similar to experiment one, behavioral data was not affected in all indicators. ERP data in experiment two showed an emotional effect on mid-frontal old/new during 300 to 500ms that the old/new difference was eliminated when retrieved under a negative context. The result provided a possible emotional effect on response bias during retrieval.