Aging and Individual Differences: A Longitudinal Analysis of Social, Psychological, and Physiological Indicators

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Abstract
Individual differences are maintained in late life. This is the conclusion from a longitudinal study of a defined older population (N=106) observed 6 times over a period of 13 years. Two hypotheses are tested and affirmed: (I) individual differences do not decrease with age in late life; and (2) individuals tend to maintain the same rank on a variety of social, psychological and physiological indicators in relation to their age peers throughout the later years of life.