|其他题名||The Age Effect of Emotional Cues on Prospective Memory Performance
研究三发现，编码阶段：（1）年轻人的LPP 波显著地大于老年人；（2）负性靶线索引起年轻人的LPP 波显著大于中性和正性；正性靶线索引起老年人的LPP 波与负性边缘显著。提取阶段：（1）和年轻人相比，老年人引发更负的N300波；（2）中性靶线索引起了更负的N300 波；（3）年轻人的顶叶正波显著地大于老年人；（4）负性靶线索引起了年轻人更正的顶叶正波，而正性靶线索则引起了老年人更正的顶叶正波。
Objective: The studies show that there is an age effect on prospective memory, the emotional cues maybe an important factor to affect the age effect. However, it is unclear that the age effect of emotional cues on prospective memory and its neural mechanism. Based on the prospective memory theory, this study explores the influence mechanism of the emotional cues on prospective memory and its age effect.
Methods: Study 1 investigated whether emotional cues improved prospective memory performance in both younger and older adults by manipulating the working memory demands of ongoing task, which used the single-event prospective memory paradigm. N-back visual working memory tasks were used as an ongoing task in addition to a prospective memory task, remembering to press a key-press when the specific cue occurred. Study 2 investigated the influence of emotional cues on prospective memory output monitoring in both younger and older adults by using the habitual prospective memory paradigm. Study 3 applied an Event-related potential approach to disentangle mechanism of emotional valence effect on prospective memory across the encoding and retrieval phases in both younger and older adults.
Results: Study 1: (1) The emotional cues could improve prospective memory performance for both younger and older adults, but the emotional valence effect is affected by the working memory demands of ongoing task; (2) Moreover, higher prospective memory accuracy was seen in younger and older adults for both positive and negative cues than for neutral ones.
Study 2: (1) Younger adults performed lower repetition error than older adults; (2) Positive and negative cues could reduce older adults’ prospective memory repetition error relative to neutral ones.
Study 3: Encoding phase: (1) The amplitude of the LPP in younger adults was larger than older adults; (2) In the negative cue condition, the amplitude of the LPP in younger adults was larger than that in the neutral and positive cues; in the positive cue condition, the amplitude of the LPP in older adults was marginally larger than that in the negative cues. Retrieval phase: (1) N300 elicited in the older adults was more negative than younger adults; (2) N300 elicited by neural cues was more negative than that by emotional cues; (3) Parietal Positivity elicited in the younger adult was more positive than older adults; (4) Parietal Positivity elicited by negative cues in the younger adults was more positive, which elicited by positive cues in the older adults was more positive.
Conclusions: (1) The emotional cues could improve prospective memory performance for both younger and older adults, but the emotional valence effect is affected by the working memory demands; (2) The emotional cues could reduce older adults’ prospective memory repetition error; (3) The mechanism of this emotional valence effect is reflected in the encoding and retrieval phases. The emotional cues would spend more cognitive resources for encoding, and are more likely to be detected and easily to accomplish the retrieval of an intention from memory.
咸金花. 情绪靶线索对前瞻记忆影响的年龄差异[D]. 北京. 中国科学院研究生院,2017.