In this chapter we will discuss the construct of emotion intelligence in relation to the construct of emotion utilization and the developmental constructs of emotion knowledge and emotion regulation. Differential emotions theory (DET), which emphasizes the adaptive, motivational, and cue-producing properties of emotions, provides the conceptual framework. We see emotion motivation as a key factor in emotion intelligence. Emotions not only motivate or drive behavior, their action tendencies and feeling states provide cues that guide cognition and action, and their expressions may motivate and guide the actions of others (Izard, 1971, 2002). We conceive emotion intelligence as involving both the motivational and informational aspects of emotions and as dependent, in part, on emotionality/temperament/personality and cognitive ability.(PsycInfo Database Record (c) 2023 APA, all rights reserved)