But to understand how the authors arrived at the results of the study, we need to take a step back and learn about personality traits. According to the Big Five theory, we all have different levels of the five personality traits,” the psychologist explained. Volunteers from both groups answered the questions, allowing the researchers to determine the scores for each person’s personality traits. “The association between personality traits, anxiety and insomnia makes it important to develop transdiagnostic treatment protocols, i.e. The article “Personality traits and insomnia: direct and anxiety-mediated associations” can be read at: onlinelibrary.wiley.com/doi/abs/10.1111/jsr.70003.