This questionnaire measures positive and negative affect. Positive affect refers to the presence of positive emotions, such as happiness, enthusiasm, and contentment, while negative affect refers to the presence of negative emotions such as anger, fear, and sadness.
Watson, D., Clark, L. A., & Tellegen, A. (1988). Development and validation of brief measures of positive and negative affect: the PANAS scales. Journal of personality and social psychology, 54(6), 1063.