Emotion refers to short-lasting affective states which occur in response to daily life events.
Emotions are complex—they involve physiological, cognitive, behavioural, and social aspects, as well as subjective feelings. Different emotions each serve distinct motivational function. There appear to be six to eight basic emotions (see Figure 1).
More simply, it's how we feel about things. Many of the chapters which follow will delve into conceptualising emotion and particular aspects of emotion - both what affects emotion and how emotion affects behaviour and thinking.
"short-lived, feeling-purposive-expressive-bodily responses that help us adapt to the opportunities and challenges we face during important life events" (Reeve, 2018, p. 288)
"synchronised brain-based systems that coordinate feeling, bodily response, purpose, and expression so to ready the individual to adapt successfully to life circumstances" (Reeve, 2018, p. 289)
"short-lived psychological-physiological phenomena that represent efficient modes of adaptation to changing environmental demands" (Levenson, 1994, p. 123)