Chronology and Aging
Our society will continue to insist on using chronological age for many purposes. We can live with this practice if we recognize that to set up a chronological checkpoint for calling a person ‘old’ is simply a matter of administrative or statistical convenience. It is an unfortunate usage but difficult to avoid. We can, as a society, minimize the negative impact of this practice by making a clear distinction in our own minds between chronological age and the individual’s actual physical, mental and social situation. We can also refuse to be swept along by the implicit relationship between chronological age and human value. ‘Ten years older’ does not mean ‘ten years worse’ or ‘ten years less valuable.’
Age-grading emphasizes society’s interest; functional age emphasizes the direct facts about the individual.