eLife assessment
This study presents valuable findings on the relationship between prediction error and brain activation in response to unexpected omissions of painful electric shock. The strengths are the research question posed, as it has remained unresolved if prediction errors in the context of biologically aversive outcomes resemble reward-based prediction errors. The evidence is incomplete due to the task design, which induces a disconnect between verbal instructions and experiential learning, and the lack of analyses accounting for learning and updating of expectations, which are crucial to neural prediction error signaling. The work will be of interest to cognitive neuroscientists and psychologists studying appetitive and aversive learning.