양측성으로 교대하는 청각자극이 삽화성 기억 인출에 미치는 영향
The Effect of Bilaterally Alternating Auditory Stimulations on the Episodic Memory Retrieval
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Objectives Previous research has shown that bilaterally alternating eye movements enhance episodic memory retrieval. This effect has been considered an important mechanism of the therapeutic effects of eye movement desensitization and reprocessing (EMDR) treatment. We conducted this study in order to test the hypothesis that bilaterally alternating auditory stimuli would also have similar effects on episodic memory retrieval. Methods Thirty eight right-handed subjects participated in this study. Subjects learned words,and then received bilaterally alternating auditory stimuli (as experimental stimuli) or unilateral auditory stimuli (as control stimuli). Subsequently, they performed recognition memory task. Recognition accuracy, response bias, and mean response to hits were used for evaluation of episodic memory retrieval. Repeated measures analysis of variance was performed for statistical analysis. Results There was no significant effect of experimental conditions in recognition accuracy, the response bias, and mean response time to hits. Conclusion Unlike the previous positive results of bilaterally alternating eye movements, we did not observe an enhancing effect of bilaterally alternating auditory stimuli compared to unilateral auditory stimuli on episodic memory retrieval. This result suggests the possibility that the therapeutic mechanisms of EMDR might differ according to modalities of bilateral stimulation.
Abstract
Objectives Previous research has shown that bilaterally alternating eye movements enhance episodic memory retrieval. This effect has been considered an important mechanism of the therapeutic effects of eye movement desensitization and reprocessing (EMDR) treatment. We conducted this study in order to test the hypothesis that bilaterally alternating auditory stimuli would also have similar effects on episodic memory retrieval. Methods Thirty eight right-handed subjects participated in this study. Subjects learned words,and then received bilaterally alternating auditory stimuli (as experimental stimuli) or unilateral auditory stimuli (as control stimuli). Subsequently, they performed recognition memory task. Recognition accuracy, response bias, and mean response to hits were used for evaluation of episodic memory retrieval. Repeated measures analysis of variance was performed for statistical analysis. Results There was no significant effect of experimental conditions in recognition accuracy, the response bias, and mean response time to hits. Conclusion Unlike the previous positive results of bilaterally alternating eye movements, we did not observe an enhancing effect of bilaterally alternating auditory stimuli compared to unilateral auditory stimuli on episodic memory retrieval. This result suggests the possibility that the therapeutic mechanisms of EMDR might differ according to modalities of bilateral stimulation.
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