≪Organizer Abstract≫
In developed countries, the age group of oldest old adults (i.e.,85+) is the largest growing segment of the older population. Recent studies have reported higher or the same level of well-being in the oldest old regardless of their functional decline. However, causal factors or background mechanisms of this higher level of well-being are still unknown. The aim of this symposium is to present empirical data and to discuss possible theoretical models which will be potential targets for future studies. Higher well-being could be attributed to the developmental change or individual characteristics of those who live longer when compared to those who die prematurely. Four studies of the oldest old from the United States, Germany, and Japan present biological, psychological, and social models of well-being.
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