Negative emotionality refers to a personality trait characterized by experiencing and expressing negative emotions such as anger, fear, sadness, and anxiety more frequently and intensely than others. Researchers often study negative emotionality as part of understanding individual differences in emotional responses and their impact on mental health and well-being. Studies in this research area may investigate the genetic, biological, and environmental factors that contribute to negative emotionality, as well as its relationship with other psychological constructs such as neuroticism, emotion regulation, and coping strategies. Understanding negative emotionality can help researchers and clinicians develop better interventions and treatments for individuals who struggle with managing their negative emotions.