Greater interoceptive accuracy was associated with overall MASC score (rs = .31, P = .008). Importantly, however, there was only a significant association between interoception and performance on items requiring the representation of another's emotion (rs = .41, P < .001), not where representation of emotional states was not required (rs = .03, P = .80). The size of these correlations was significantly different (z = 2.38, P = .017). This pattern of results (Fig. 1B) was supported by a Bayesian analysis and held after controlling for participants' age, gender, task completion time, time estimation ability and their performance on control questions (Supplemental Tables S1–S5).