The role of multisensory memories in unisensory object discrimination
The role of multisensory memories in unisensory object discrimination
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DOI：
10.1016/j.cogbrainres.2005.02.005
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发表时间：
2005-07-01
期刊：
影响因子：
--
通讯作者：
Murray, MM
中科院分区：
文献类型：
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作者：
Lehmann, S;Murray, MM
过去的多感觉经验可以影响当前的单感觉处理和记忆表现。重复的图像，更好地区分，如果最初提出的视觉对，而不是只在视觉上。因此，一个经验的背景在后来对某些方面的重复识别的程度上起着作用。在这里，我们调查的因素在最初的多感官体验，是必不可少的产生改善记忆perfonnance。主题歧视重复与初始图像呈现混杂在一个连续的识别任务。最初的演示有一半是多感官的，所有的重复都是视觉的。实验1研究是否纯粹的情节多感官信息足以提高以后的歧视性能配对的视觉对象与音调或振动。因此，我们也可以评估是否可以引起不同的感觉配对的影响。实验2通过操纵听觉和视觉物体刺激之间的一致性来考察语义语境。相对于图像只遇到视觉，在区分图像重复的准确性显着受损的视觉，但不受体感视觉多感官记忆痕迹。相比之下，这种准确性选择性增强的视觉刺激与语义一致的多感官过去和语义不一致的多感官过去不变。集体的结果揭示了对立的影响，纯粹的情节与语义信息的视觉多感官事件。尽管如此，这两种类型的多感觉记忆痕迹都可以用于处理传入的刺激，并且确实导致不同的视觉对象处理，导致相对于单感觉记忆痕迹的受损或增强的性能。我们讨论这些结果支持基于对象的多感官交互模型。(c)2005 Elsevier B.V.保留所有权利。
Past multisensory experiences can influence current unisensory processing and memory performance. Repeated images are better discriminated if initially presented as auditory-visual pairs, rather than only visually. An experience's context thus plays a role in how well repetitions of certain aspects are later recognized. Here, we investigated factors during the initial multisensory experience that are essential for generating improved memory perfonnance. Subjects discriminated repeated versus initial image presentations intermixed within a continuous recognition task. Half of initial presentations were multisensory, and all repetitions were only visual. Experiment 1 examined whether purely episodic multisensory information suffices for enhancing later discrimination performance by pairing visual objects with either tones or vibrations. We could therefore also assess whether effects can be elicited with different sensory pairings. Experiment 2 examined semantic context by manipulating the congruence between auditory and visual object stimuli within blocks of trials. Relative to images only encountered visually, accuracy in discriminating image repetitions was significantly impaired by auditory-visual, yet unaffected by somatosensory-visual multisensory memory traces. By contrast, this accuracy was selectively enhanced for visual stimuli with semantically congruent multisensory pasts and unchanged for those with semantically incongruent multisensory pasts. The collective results reveal opposing effects of purely episodic versus semantic information from auditory-visual multisensory events. Nonetheless, both types of multisensory memory traces are accessible for processing incoming stimuli and indeed result in distinct visual object processing, leading to either impaired or enhanced performance relative to unisensory memory traces. We discuss these results as supporting a model of object-based multisensory interactions. (c) 2005 Elsevier B.V. All rights reserved.