Negative Affectivity (NA; Neuroticism)

Susceptibility to negative affect. Individuals high on trait neuroticism, relative to those low on trait neuroticism, are more likely to have an aversive motivation system that appears to inhibit behaviour through negative affect. As such, individuals who are high on trait neuroticism are likely to be sensitive towards negative affect given their heightened reactivity towards punishments and threats. Contrast with positive affectivity (PA; extraversion), need for affect and susceptibility to emotional contagion.

Reference:

Watson, D., Clark, L. A., & Carey, G. (1988). Positive and negative affectivity and their relation to anxiety and depressive disorders. Journal of Abnormal Psychology, 97(3), 346–353. https://doi.org/10.1037/0021-843X.97.3.346

Costa, P. T., & McCrae, R. R. (1980). Influence of extraversion and neuroticism on subjective well-being: Happy and unhappy people. Journal of Personality and Social Psychology, 38(4), 668–678. https://doi.org/10.1037/0022-3514.38.4.668