Trait research refers to the study of individual differences in behavior, personality, and other psychological characteristics. Researchers in this field investigate how traits develop, how they are expressed in different situations, and how they are related to various outcomes such as mental health, relationships, and job performance. Trait research is often used to understand personality traits, such as the Big Five (openness, conscientiousness, extraversion, agreeableness, and neuroticism), as well as other individual differences such as intelligence, impulsivity, and creativity. This area of research is important for understanding human behavior and addressing a wide range of issues in fields such as psychology, sociology, and organizational behavior.