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During social interaction, we evaluate and make decisions about each other’s behaviour and actions. However, factors underlying this decision making can be complex, and are often non-transparent to those making them. The focus of this Collection is the processes underlying moral judgements, or in other words, how we make decisions of punishment or reward, attribute responsibility, and infer causal relations. This includes work that investigates how we decide between causal responsibility for harm and culpable mental states, as well as what people's perceptions of harm are and how they differ between individuals. We also welcome research exploring how various factors - expectations, prior beliefs, relationships - influence how we evaluate other’s actions.
The study of moral judgement and decision making examines the way predictions made by moral and ethical theories fare in real world settings. Such investigations are carried out using a variety of approaches and methods, such as experiments, modeling, and observational and field studies, in a variety of populations. The current Collection on moral judgments and decision making includes works that represent this variety, while focusing on some common themes, including group morality and the role of affect in moral judgment. The Collection also includes a significant number of studies that made theoretically driven predictions and failed to find support for them. We highlight the importance of such null-results papers, especially in fields that are traditionally governed by theoretical frameworks.