Three main versions of cognition-arousal theory are distinguished depending on how they interpret the theory’s basic postulate, that an emotion is a function of cognition and arousal: objectivist causal theories, attributional theories, and fusion theories. The objectivist causal and attributional theories each comprise a causal-functional and a part-whole version, and the fusion theory subsumes in particular a categorization and a perceptual integration version. In addition, the attributional version of cognition-arousal theory can be reinterpreted as a theory of emotion self-ascription. Although (...) arousal may in fact not be necessary for emotions, a modified cognition-feeling theory that replaces arousal with intrinsically affective feelings, seems still viable. Arguments are presented why the objectivist causal-functional version of this theory should be preferred. (shrink)