What is the definition of subjective age? How to measure it?

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Definition of Subjective Age

Subjective age (SA) refers to how old or young individuals perceive themselves to be, regardless of their chronological age. It captures a person's self-assessment of their aging process and is considered a marker of psychological well-being and health status.

Measuring Subjective Age

SA is typically measured in research studies by directly asking individuals how old or young they feel. It can then be reported and analyzed in different ways:

An age discrepancy score is calculated by subtracting chronological age from felt age.

A proportion score is computed as (felt age - chronological age) / chronological age.

By categorizing individuals into those who feel younger, the same, or older than their actual age.

Measuring SA across different life domains, such as family, friends, work, and health, provides a more comprehensive understanding of individuals' subjective aging experiences.