Identity is the qualities, beliefs, personality traits, appearance, and/or expressions that characterize a person or a group.
Identity emerges during childhood as children start to comprehend their self-concept, and it remains a consistent aspect throughout different stages of life. Identity is shaped by social and cultural factors and how others perceive and acknowledge one's characteristics. The etymology of the term "identity" from the Latin noun identitas emphasizes an individual's mental image of themselves and their "sameness with others". Identity encompasses various aspects such as occupational, religious, national, ethnic or racial, gender, educational, generational, and political identities, among others.
Identity serves multiple functions, acting as a "self-regulatory structure" that provides meaning, direction, and a sense of self-control. It fosters internal harmony and serves as a behavioral compass, enabling individuals to orient themselves towards the future and establish long-term goals. As an active process, it profoundly influences an individual's capacity to adapt to life events and achieve a state of well-being. However, it is important to note that identity originates from traits or attributes that individuals may have little or no control over, such as their family background or ethnicity.
In sociology, emphasis is placed by sociologists on collective identity, in which an individual's identity is strongly associated with role-behavior or the collection of group memberships that define them. According to Peter Burke, "Identities tell us who we are and they announce to others who we are." Identities subsequently guide behavior, leading "fathers" to behave like "fathers" and "nurses" to act like "nurses."
In psychology, the term "identity" is most commonly used to describe personal identity, or the distinctive qualities or traits that make an individual unique. Identities are strongly associated with self-concept, (one's mental model of oneself), self-esteem, and individuality.