One of these scales measures positive affect, and the other measures negative affect.
Since its inception in 1988 (Watson, Clark, & Tellegen), it has been one of the most widely used scales in psychology, and is particularly popular in positive psychology.. (Magyar-Moe, 2009).
Used as a psychometric scale, the PANAS can show relations between positive and negative affect with personality stats and traits. The Positive and Negative Affect Schedule (PANAS) comprises two mood scales, one that measures positive affect and the other which measures negative affect. (Magyar-Moe, 2009). Positive and Negative Affect Schedule (PANAS-SF) Indicate the extent you have felt this way over the past week.
The Positive and Negative Affect Schedule, or PANAS for short, was developed to measure both positive and negative affect in individuals. The Positive and Negative Affect Schedule or (PANAS) is a scale that consists of different words that describe feelings and emotions. Development and validation of brief measures of positive and negative affect: the PANAS scales.
Journal of personality and social psychology, 54 (6), 1063. (1988).
Very slightly or not at all ... Watson, D., Clark, L. A., & Tellegen, A. Ten descriptors are used for each PA scale and NA to define their meanings.