Digital agents with human-like characteristics have become ubiquitous in our society and are increasingly relevant in commercial applications. While some of them closely resemble humans in appearance (e.g., digital humans), they still lack many subtle social cues that are important for interacting with humans. Among them are the so-called microexpressions— facial expressions that are short, subtle, and involuntary. We investigate to what extent microexpressions in digital humans influence people's perceptions and decision-making in order to inform the practices of digital human's design. Our two experiments applied four types of microexpressions based on emotion type (happiness and anger) and intensity (normal and extreme). This paper is among the first to design and evaluate microexpressions with different intensity levels in digital humans. In particular, we leverage the possibilities of digitally (re)designing humans and human perception. These possibilities are feasible only in a digital environment, where it is possible to explore various microexpressions beyond real human beings' physical capabilities.

具有类人特征的数字代理已在我们的社会中无处不在，并且在商业应用中越来越重要。虽然其中一些在外观上与人类非常相似（例如，数字人类），但它们仍然缺乏许多对于与人类互动很重要的微妙社会线索。其中包括所谓的微表情——简短、微妙和不由自主的面部表情。我们调查数字人类的微表情在多大程度上影响人们的感知和决策，以便为数字人类设计的实践提供信息。我们的两个实验应用了四种基于情绪类型（快乐和愤怒）和强度（正常和极端）的微表情。本文是最早设计和评估数字人类不同强度水平的微表情的论文之一。特别是，我们利用数字化（重新）设计人类和人类感知的可能性。这些可能性只有在数字环境中才是可行的，在数字环境中可以探索超越真实人类身体能力的各种微表情。