Paul Morris

A defining characteristic of primary emotions is that they occur in wide variety of species. Secondary emotions are thought to be restricted to humans and other primates. We report evidence from two studies investigating claims of primary and secondary emotions in non-primate species. Study 1. We surveyed 907 owners about emotions that they had observed in their animal. Participants reported primary emotions more frequently than secondary emotions and self-conscious emotions more frequently than self-conscious evaluative emotions. Jealousy was reported at very high levels (81% of dogs and 79% of horses), which was surprising as jealousy is generally defined as a secondary emotion. Study 2. Forty dog owners were interviewed about the contexts and behaviours that led them to claim their animal was jealous. There was coherence and consistency in the behavioural descriptions of jealousy. We claim that such reports provide evidence for the existence of secondary emotions in non-primate species as predicted by theorists such as Buck (Citation1999).

The theory-theory is not supported by evidence in the everyday actions of infants and toddlers whose lives a Theory of Mind is meant radically to transform. This paper reviews some of these challenges to the theory-theory, particularly from communication and deception. We argue that the theory’s disconnection from action is both inevitable and paradoxical. The mind–behaviour dualism upon which it is premised requires a conceptual route to knowing minds and disallows a real test of the theory through the study of action. Taking engagement seriously avoids these problems and requires that both lay people and psychologists be participants rather than observers in order to know, and indeed to create, minds.