Positive and Negative Affect Schedule (PANAS)

A 20-item self-report scale commonly used to assess mood, comprising of 10 positive and 10 negative state items. Items are rated on a 5 point Likert scale (1: Not at all, 5: Extremely), with higher scores indicating predominant mood.

Reference:
Larsen, R. J., & Ketelaar, T. (1989). Extraversion, neuroticism and susceptibility to positive and negative mood induction procedures. Personality and Individual Differences, 10(12), 1221-1228. Doi: 10.1016/0191-8869(89)90233-X

Weiner, B., Graham, S., & Chandler, C. (1982). Pity, Anger, and Guilt: An Attributional Analysis. Personality and Social Psychology Bulletin, 8(2), 226-232. doi: 10.1177/0146167282082007.

Goetz, J. L., Keltner, D., & Simon-Thomas, E. (2010). Compassion: an evolutionary analysis and empirical review. Psychological Bulletin, 136(3), 351-374. doi: 0.1037/a0018807.