Emotions and moods are both types of affect, or feelings. Emotions are brief responses to specific events or stimuli and include feelings like anger, fear, happiness. Moods are less intense and don't have a clear cause; moods last longer and include overall positive and negative affect. While there are many emotions, researchers often identify six universal emotions - anger, fear, sadness, happiness, disgust, and surprise. Moods can also be classified as positive or negative affect.