Self-esteem is an individual's subjective evaluation of their own worth. Self-esteem encompasses beliefs about oneself (for example, "I am unloved", "I am worthy") as well as emotional states, such as triumph, despair, pride, and shame. The State Self Esteem Scale (SSES) a 20-item scale that measures a participant’s self-esteem at a given point in time. The 20 items are subdivided into 3 components of self-esteem: (1) performance self-esteem, (2) social self esteem, and (3) appearance self-esteem.
Heatherton, T. F. & Polivy, J. (1991)