Low Jia Y, Lindell Annukka K
Department of Psychology and Counselling, School of Psychology and Public Health, La Trobe University, Bundoora, Melbourne, VIC 3086, Australia.
Brain Cogn. 2016 Aug;107:10-5. doi: 10.1016/j.bandc.2016.06.001. Epub 2016 Jun 28.
People perceive the left cheek as more emotionally expressive than the right. Both configural and featural information enable the evaluation of emotional expressions; whether they make equivalent contributions to the left cheek bias is undetermined. As scrambling faces disrupts configural processing whilst leaving featural information intact, we investigated whether configural information is necessary, or featural information is sufficient, to induce a left cheek bias for emotion perception. Eighty-one participants (65 F, 16 M) viewed two types of left and right cheek image pairs - normal, scrambled - and indicated which image appeared happier (half mirror-reversed to control for perceptual biases). Results indicated a left cheek bias for both normal and scrambled faces, irrespective of mirror reversal. As scrambling faces disrupts configural processing, the fact that the left cheek was perceived as more expressive even when scrambled confirms that differences between the cheeks' featural information are sufficient to induce the left cheek bias.
人们认为左脸颊比右脸颊更具情感表现力。整体结构信息和局部特征信息都有助于对情感表达进行评估；它们对左脸颊偏向的贡献是否等同尚不确定。由于打乱面部图像会破坏整体结构处理，而局部特征信息保持不变，我们研究了对于情感感知而言，诱导左脸颊偏向是需要整体结构信息还是局部特征信息就足够了。81名参与者（65名女性，16名男性）观看了两种类型的左右脸颊图像对——正常的、打乱的——并指出哪张图像看起来更快乐（一半进行了镜像反转以控制感知偏差）。结果表明，无论是否镜像反转，正常和打乱的面部图像都存在左脸颊偏向。由于打乱面部图像会破坏整体结构处理，即使在图像被打乱的情况下左脸颊仍被认为更具表现力，这一事实证实了脸颊局部特征信息的差异足以诱导左脸颊偏向。
