Scatterplots depicting the relationship between the number of errors made in pattern classification and the subjective experience of emotion for 21 pairwise combinations of seven distinct emotional states (Kragel & LaBar, 2013). The number of errors in classifying autonomic response patterns decreases with Euclidean distance in an affective space created using the experience of categorical items (e.g. ‘fear’, ‘anger’, ‘sadness’; white circles in right panel) but not in a space constructed using dimensional items of valence and arousal (left panel). Adapted from “Multivariate pattern classification reveals autonomic and experiential representations of discrete emotions,” by P. A. Kragel & K. S. LaBar, Emotion, 13, in press. Copyright 2013 by the American Psychological Association. Adapted with permission.