<b>Dyadic Person Similarity Predicts Similarity in Face Judgments</b>

Here we share our data and code for our project <b>Dyadic Person Similarity Predicts Similarity in Face Judgments.</b>Research shows that perceivers consistently extract information from faces to judge whether others are attractive, trustworthy, or dominant. However, there is also substantial variability among perceivers when making these social judgements. We seem to use our own dispositions as frameworks for making judgements about others, so could it be that two people who are similar in their dispositions also tend to make more similar social judgements? A consistent understanding of others may serve as a foundation for our social relationships, be it platonic or romantic. The present study investigated whether dyadic similarities in participants’ own dispositions are related to similarities in their social face judgements. 307 participants based in the UK rated 24 faces on six social traits. Participants also rated themselves on 13 social traits and completed a 60-item personality questionnaire. We computed dissimilarities between pairs of participants for face judgements, self-perceived trait ratings, and personality ratings, resulting in three separate dissimilarity matrices. Each entry in each matrix depicted pairwise distances in ratings between participants. Using representational similarity analysis, the three matrices were then correlated with each other. Results showed that both the self-perceived trait and personality matrices were significantly correlated with the face judgement matrix respectively. These results indicate that participants with more similar personalities and social trait dispositions were more likely to make similar social face judgements. Importantly, these associations were stable even when controlling for age, gender, ethnicity, and geographical location<i>. </i>These findings show that people who are more similar to each other also perceive the world in a similar manner and may form the basis for how we gravitate towards others, build connections and form relationships.The study was approved by the Psychology Research Ethics Committee at City, University of London.We pre-registered our study, specifying sample size, inclusion, and exclusion criteria (https://doi.org/10.17605/OSF.IO/ZR92G).Here we share the raw anonymised data and the code we used for main analyses. The README file explains the folder contents, including what each script does. Raw data consists of csv files for each participant. Code runs in MATLAB.<br>本研究共享项目《二人个体相似性可预测面孔判断的相似性》的相关数据与代码。已有研究表明，知觉者会持续从面孔中提取信息，以判断他人的吸引力、可信度或支配性。但在完成这类社会判断时，不同知觉者之间存在显著差异。我们似乎会以自身的特质倾向作为判断他人的参照框架，那么，特质倾向相似的两人，是否也更倾向于做出相似的社会判断？对他人的一致性认知，可作为我们各类社会关系（无论是柏拉图式友谊还是浪漫关系）的基础。 本研究旨在探讨参与者自身特质倾向的二人组相似性，是否与其社会面孔判断的相似性相关。共有307名英国籍参与者参与实验：他们需针对24张面孔的6项社会特质进行评分，同时完成13项自身社会特质自评，并填写一份包含60个题项的人格问卷。研究人员计算了参与者配对在面孔判断、自我感知特质评分以及人格评分上的不相似性，由此得到三个独立的不相似性矩阵，每个矩阵中的每一项均代表两名参与者之间的评分两两距离。随后借助表征相似性分析（Representational Similarity Analysis, RSA），对这三个矩阵进行两两相关分析。 结果显示，自我感知特质矩阵与人格矩阵均分别与面孔判断矩阵存在显著相关。这表明，人格与社会特质倾向更为相似的参与者，更易做出相似的社会面孔判断。值得注意的是，即便在控制年龄、性别、种族与地理位置等变量后，上述关联依然稳定。 本研究结果表明，彼此更为相似的个体，对世界的感知方式也更为相近，这或许可以解释我们为何会被他人吸引、建立联结并形成社会关系。 本研究已获得伦敦城市大学心理学研究伦理委员会的批准。我们预先在平台注册了该研究，明确了样本量、纳入与排除标准（https://doi.org/10.17605/OSF.IO/ZR92G）。 本次我们将共享研究的匿名原始数据与核心分析所用代码。README文件将说明文件夹内的所有内容，包括各脚本的功能。原始数据以每位参与者对应一个CSV文件的形式存储。代码可在MATLAB环境中运行。