Abstract
The relation between adult age and temperament was investigated using the Guilford-Zimmerman Temperament Survey. Between the years 1958 and 1974, the GZTS was administered to 915 men from 17 to 98 years of age in the Baltimore Longitudinal Study. Repeated measures were obtained for 336 men approximately 7 years after initial testing. Each GZTS scale was analyzed cross-sectionally and longitudinally. Sequential analyses of independent samples were also carried out in an attempt to separate the effects of maturation from those of generational and cultural change. Results showed that Masculinity declined at all ages, but General Activity declined only after age 50. Thoughtfulness and Personal Relations showed cultural declines during the time period studied, whereas Friendliness showed a long-term cultural decline. Later-born cohorts were lower in Restraint and higher in Ascendance than early-born cohorts.
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