User ratings are widely used in web systems and applications to provide personalized interaction and to help other users make better choices. Previous research has shown that rating scale features and user personality can both influence users' rating behaviour, but relatively little work has been devoted to understanding if the effects of rating scale features may vary depending on users' personality. In this paper, we study the impact of scale granularity and colour on the ratings of individuals with different personalities, represented according to the Big Five model. To this aim, we carried out a user study with 203 participants, in the context of a web-based survey where users were assigned an image rating task. Our results confirm that both colour and granularity can affect user ratings, but their specific effects also depend on user scores for certain personality traits, in particular agreeableness, openness to experience and conscientiousness.

翻译：用户评分广泛应用于网络系统与应用中，以提供个性化交互并帮助其他用户做出更优选择。已有研究表明，评分量表特征和用户个性均会影响用户的评分行为，但关于评分量表特征的影响是否因用户个性不同而存在差异的研究相对较少。本文基于大五人格模型，研究了评分量表粒度与颜色对不同个性个体评分行为的影响。为此，我们开展了一项包含203名参与者的用户研究，在基于网络问卷的图像评分任务中收集数据。研究结果证实，颜色和粒度均会影响用户评分，但其具体效应还与用户在某些人格特质（特别是宜人性、经验开放性和尽责性）上的得分相关。