Thom Nathaniel, Knight Justin, Dishman Rod, Sabatinelli Dean, Johnson Douglas C, Clementz Brett
Department of Applied Health Science, Wheaton College, Wheaton, IL, 60187, USA,
Cogn Affect Behav Neurosci. 2014 Jun;14(2):849-60. doi: 10.3758/s13415-013-0225-z.
Emotional faces and scenes carry a wealth of overlapping and distinct perceptual information. Despite widespread use in the investigation of emotional perception, expressive face and evocative scene stimuli are rarely assessed in the same experiment. Here, we evaluated self-reports of arousal and pleasantness, as well as early and late event-related potentials (e.g., N170, early posterior negativity [EPN], late positive potential [LPP]) as subjects viewed neutral and emotional faces and scenes, including contents representing anger, fear, and joy. Results demonstrate that emotional scenes were rated as more evocative than emotional faces, as only scenes produced elevated self-reports of arousal. In addition, viewing scenes resulted in more extreme ratings of pleasantness (and unpleasantness) than did faces. EEG results indicate that both expressive faces and emotional scenes evoke enhanced negativity in the N170 component, while the EPN and LPP components show significantly enhanced modulation only by scene, relative to face stimuli. These data suggest that viewing emotional scenes results in a more pronounced emotional experience that is associated with reliable modulation of visual event-related potentials that are implicated in emotional circuits in the brain.
情绪化的面部表情和场景承载着大量重叠且独特的感知信息。尽管在情绪感知研究中广泛使用,但富有表现力的面部表情和唤起情感的场景刺激很少在同一实验中进行评估。在此,我们评估了唤醒感和愉悦感的自我报告,以及早期和晚期事件相关电位(例如,N170、早期后部负电位[EPN]、晚期正电位[LPP]),实验中让受试者观看中性和情绪化的面部表情及场景,包括代表愤怒、恐惧和喜悦的内容。结果表明,情绪化场景被评为比情绪化面部表情更具唤起力,因为只有场景会使唤醒感的自我报告升高。此外,观看场景比观看面部表情会产生更极端的愉悦感(和不愉悦感)评分。脑电图结果表明,富有表现力的面部表情和情绪化场景都会在N170成分中引起增强的负电位,而相对于面部刺激,EPN和LPP成分仅在场景刺激下显示出显著增强的调制。这些数据表明,观看情绪化场景会导致更明显的情感体验,这与大脑情感回路中涉及的视觉事件相关电位的可靠调制有关。