Positive and Negative Affect Schedule, PANAS
Online version of the Positive and Negative Affect Schedule (PANAS) by Watson, Clark, and Tellegen, developed to measure someone's positive and negative affect.
- David Watson, Lee Anna Clark, Auke Tellegen. Development and validation of brief measures of positive and negative affect: The PANAS scales // Journal of Personality and Social Psychology, 1988. 54(6)