Memory, emotion, and pupil diameter: Repetition of natural scenes
Memory, emotion, and pupil diameter: Repetition of natural scenes
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DOI：
10.1111/psyp.12442
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发表时间：
2015-09-01
期刊：
影响因子：
3.7
通讯作者：
Lang, Peter J.
中科院分区：
文献类型：
--
作者：
Bradley, Margaret M.;Lang, Peter J.
近期研究表明，瞳孔直径可能像新旧效应的事件相关电位（ERP）一样，是一种记忆的衡量指标。由于在分布式（间隔的）重复情境下编码的项目，其新旧效应的事件相关电位幅度相较于集中式（连续的）重复有所增强，我们研究了瞳孔直径是否对重复也有类似的敏感性。自然场景的情绪化和中性图片在偶然的自由观看过程中被观看一次，或者以集中式（连续的）或分布式（间隔的）重复方式重复观看，然后进行外显识别测试。尽管在成功识别过程中发现了瞳孔直径的新旧差异，但在识别或初始自由观看过程中，分布式重复相较于集中式重复，瞳孔直径并没有增强。此外，虽然在编码过程中仅看过一次的色情场景中发现了显著的新旧差异，但当色情场景被重复观看时，这种差异就不存在了。综合来看，这些数据表明瞳孔直径并不是自然场景先前出现情况的一个直接指标。
Recent studies have suggested that pupil diameter, like the old-new ERP, may be a measure of memory. Because the amplitude of the old-new ERP is enhanced for items encoded in the context of repetitions that are distributed (spaced), compared to massed (contiguous), we investigated whether pupil diameter is similarly sensitive to repetition. Emotional and neutral pictures of natural scenes were viewed once or repeated with massed (contiguous) or distributed (spaced) repetition during incidental free viewing and then tested on an explicit recognition test. Although an old-new difference in pupil diameter was found during successful recognition, pupil diameter was not enhanced for distributed, compared to massed, repetitions during either recognition or initial free viewing. Moreover, whereas a significant old-new difference was found for erotic scenes that had been seen only once during encoding, this difference was absent when erotic scenes were repeated. Taken together, the data suggest that pupil diameter is not a straightforward index of prior occurrence for natural scenes.