Comment on an article by Peter Zachar An account of emotion must include categories and dimensions. Categories because humans categorize reality, and a person's categorization of their own state influences aspects of that state. Dimensions because humans are always in some state of Core Affect, which varies by degree along dimensions of valence and activation . In Psychological Construction, Core Affect and a host of other "components" are separate on-going processes, always in some pattern. Occasionally the pattern resembles a prototype (...) of a category of emotion sufficiently to count as an instance of that category. 2012 APA, all rights reserved). (shrink)