“…Studies that induced changes in arousal through subliminal affective priming (Allen et al, 2016) and pharmacological manipulation (Hauser et al, 2017) suggested that arousal responses may reduce the tendency to adjust metacognitive judgements according to internal or external noise, although they disagreed on which aspect of metacognition (sensitivity or bias) was most affected. Additionally, some studies have reported that negatively-valenced material increased measures of confidence in perception (Koizumi, Mobbs, & Lau, 2016) and in subsequent recall (Schwartz, 2010, Zimmerman and Kelley, 2010), while others found no effect of negative valence on metacognition (D'Angelo and Humphreys, 2012, Jersakova et al, 2015). Though these studies offer mixed evidence on the relations between arousal, affect, and metacognition, they suggest that the negatively valenced and arousing qualities of nociceptive pain could alter the calibration of metacognitive judgements, perhaps yielding over-confidence in perceptual decisions.…”