Emotional picture and word processing: an FMRI study on effects of stimulus complexity.
Emotional picture and word processing: an FMRI study on effects of stimulus complexity.
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DOI：
10.1371/journal.pone.0055619
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Jacobs AM
中科院分区：
文献类型：
--
作者：
Schlochtermeier LH;Kuchinke L;Pehrs C;Urton K;Kappelhoff H;Jacobs AM
关于情绪体验方面的神经科学研究通常集中在一种刺激方式上（例如，图片或文字）。不同模态之间处理过程的相似性和差异很少被直接研究。言语和图片的情绪刺激的比较往往揭示了处理的优势，情绪图片在更大或更明显的情绪效果引起的图片刺激。在这项研究中，我们研究了这种图片优势是否是指一般的处理差异，或者它是否可能部分归因于图片和文字之间的视觉复杂性的差异。我们首先开发了一个新的刺激数据库，包括效价和唤醒率为200多个具体的对象表示在不同的方式，包括不同层次的复杂性：单词，短语，象形图，和照片。使用功能磁共振成像，然后我们研究了这些情绪刺激在效价判断任务，其中的刺激材料的情绪唤醒的差异控制的处理的神经相关。图形刺激在情绪信息加工方面没有优势，主要表现在知觉加工区域。虽然视觉复杂性可能部分解释了先前发现的情感刺激处理差异，但主要的现有处理差异可能是由于特定于模态的感知区域的增强处理。我们认为，无论是图片和文字引起的情绪反应，没有一般的优势，无论是刺激方式，而情绪反应的图片调制的知觉刺激功能，如图片的复杂性。
Neuroscientific investigations regarding aspects of emotional experiences usually focus on one stimulus modality (e.g., pictorial or verbal). Similarities and differences in the processing between the different modalities have rarely been studied directly. The comparison of verbal and pictorial emotional stimuli often reveals a processing advantage of emotional pictures in terms of larger or more pronounced emotion effects evoked by pictorial stimuli. In this study, we examined whether this picture advantage refers to general processing differences or whether it might partly be attributed to differences in visual complexity between pictures and words. We first developed a new stimulus database comprising valence and arousal ratings for more than 200 concrete objects representable in different modalities including different levels of complexity: words, phrases, pictograms, and photographs. Using fMRI we then studied the neural correlates of the processing of these emotional stimuli in a valence judgment task, in which the stimulus material was controlled for differences in emotional arousal. No superiority for the pictorial stimuli was found in terms of emotional information processing with differences between modalities being revealed mainly in perceptual processing regions. While visual complexity might partly account for previously found differences in emotional stimulus processing, the main existing processing differences are probably due to enhanced processing in modality specific perceptual regions. We would suggest that both pictures and words elicit emotional responses with no general superiority for either stimulus modality, while emotional responses to pictures are modulated by perceptual stimulus features, such as picture complexity.
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