“…Tremendous efforts have been undertaken to understand the influence of ambiguous cues or options on subsequent decision‐making, which has led to the discovery that people show ambiguity aversion (i.e., people are likely to avoid ambiguity when making choices; Heath & Tversky, 1991; Hsu, Bhatt, Adolphs, Tranel, & Camerer, 2005; Levy, Snell, Nelson, Rustichini, & Glimcher, 2010; for a review, see Platt & Huettel, 2008). In contrast, feedback ambiguity has received limited attention, despite its pervasiveness in daily life (Ernst & Steinhauser, 2015). Additionally, a large number of previous studies focus on the abnormal processing of ambiguous feedback processing in certain groups, such as anxious/depressive individuals and elderly adults (Amir, Beard, & Bower, 2005; Dykman & Volpicelli, 1983; Herbert, Eppinger, & Kray, 2011), rather than its general mechanisms, which is the focus of the current study.…”