An individual’s perceived age, also called “feel age,” is defined as their personal perception of their own age, influenced by various internal factors. This concept was developed by Jacob Tuckman and Irving Lorge in 1954. Unlike chronological age, cognitive age reflects how a person perceives themselves psychologically. Although subjective, it can be a more relevant indicator of age segmentation than chronological age when accurately measured. While applicable to any age group, cognitive age is primarily studied in mature and older individuals, generally from age 55 onward, according to Van Auken and Barry. Denis Guiot, a French specialist in this concept, emphasizes that the interpretation of cognitive age is not uniform and describes it as a component of aging theories, linked to psychological, biological, and social aging. Subjective age, which encompasses different perceptions of felt age, is considered a key element in the construction of individual identity.