: Typically lists six basic emotions: anger, disgust, fear, happiness, sadness, and surprise.

: The level of physical excitation or personal power associated with the feeling.

: Arranges 8 primary emotions (and their opposites) on a color-coded wheel to show how they blend. Computational Techniques

: These represent emotions in a geometric space, often using two primary axes: Valence : How positive or negative a feeling is.