Neurotic people are more likely to suffer from mood swings, study finds

In everyday life, our emotions often change from moment to moment, and people experience these fluctuations to varying degrees. Psychologists at Leipzig University have studied the relationship between the personality trait neuroticism—a potential risk factor for mental health—and emotional experiences. They found that neurotic people experience negative emotions not only more intensely, but also with more mood swings than others. They have just published their findings in the Proceedings of the National Academy of Sciences (PNAS).

"Previous studies are in agreement that neurotic people experience stronger negative emotions in everyday life. Because of new, contradictory studies, there has been disagreement about whether this is also associated with increased variability in emotional experiences, i.e., mood swings," says the study's first author, Nina Mader from the Wilhelm Wundt Institute of Psychology at Leipzig University.

Personality psychologists at Leipzig University have developed a new approach to modeling data that solves previous methodological problems. "We use an approach from Bayesian statistics that allows additional flexibility in data modeling. We first successfully tested this approach in simulations and then re-examined 13 longitudinal data sets. The results suggest that neurotic people do indeed experience greater variability in negative emotions," explains Mader. A total of 2,518 people were asked about their emotions.

Neuroticism is a personality trait. Personality traits are relatively stable and consistent across situations over time. They encompass both our experiences and our behavior, including how we think (cognition) and how we feel (affect). People have different personalities and therefore different levels of neuroticism. "So there is not a black-and-white division between neurotic and non-neurotic people, but rather a dimensional continuum with many shades of gray," says the psychologist.

People with high neuroticism scores not only experience negative emotions more strongly, but also more often than people with average or below-average scores. They are more often self-critical, react more poorly to external criticism, and are more likely to experience feelings of "not being good enough." Studies have shown that neuroticism scores are highest in late adolescence and then decline and stabilize in adulthood. In addition, women and people with a low socio-economic status have higher neuroticism scores than other people.

Since the 1990s, personality psychologists have been interested in whether and how personality influences our emotional experiences. Several studies have assessed the personalities of large samples and observed emotional experiences over time. For example, respondents were asked several times a day how sad, angry or bored they felt on a scale of 1 to 7. This revealed a clear connection between neuroticism and the experience of negative emotions.

"While negative emotions occur very rarely in the everyday lives of people with low neuroticism scores, people with high neuroticism scores report significantly more negative emotions in everyday life," explains Mader. This is typically associated with a disproportionate reaction to triggering circumstances. For example, a minor difference of opinion could cause great anger in the latter, or even the mere thought that the train might be very crowded today could cause intense stress and worry.