Temperaments arc often regarded as biologically based psychological tendencies with intrinsic paths of development. It is argued that this definition applies to the personality traits of the five-factor model. Evidence for the endogenous nature of traits is summarized from studies of behavior genetics, parentchild relations, personality structure, animal personality, and the longitudinal stability of individual differences. New evidence for intrinsic maturation is offered from analyses of NEO Five-Factor Inventory scores for men and women age 14 and over in German, British, Spanish, Czech, and Turkish samples (N = 5,085). These data support strong conceptual links to child temperament despite modest empirical associations. The intrinsic maturation of personality is complemented by the culturally conditioned development of characteristic adaptations that express personality; interventions in human development are best addressed to these.There are both empirical and conceptual links between child temperaments and adult personality traits. The empirical associations are modest, but the conceptual relations are profound. Explaining how this is so requires a complicated chain of arguments and evidence. For example, we report cross-sectional data showing (among other things) that adolescents are lower in Conscientiousness than are middle-aged and older adults in Germany, the United Kingdom, Spain, the Czech Republic, and Turkey. The relevance of such data may not be immediately obvious, but in fact they speak to the transcontextual nature of personality traits and thus to the fundamental issue of nature versus nurture.

We tested the hypothesis that there are three major prototypic patterns of personality description (resilient, overcontrolled, and undercontrolled) in a series of studies including adults' self‐descriptions on the Big Five and parents' Big Five and Q‐Sort judgments of their children, using both replicated cluster analyses and replicated Q‐factor analyses. The consistency of the prototypes across ages, judges, and methods was quantitatively measured. The results confirmed the hypothesis in all studies. Personality, social relationship, and social interaction correlates of the prototypes indicated externalizing tendencies for undercontrollers and internalizing tendencies for overcontrollers for both children and adults. The studies provide strong evidence for a three‐prototype model of personality description at the highest level of analysis for both childhood and adulthood. Copyright © 2001 John Wiley & Sons, Ltd.

Both cross-sectional and longitudinal studies in the United States have shown consistent changes between college age and middle adulthood. There appear to be declines in 3 of the 5 major factors of personality--Neuroticism, Extraversion, and Openness--and increases in Agreeableness and Conscientiousness. To examine cross-cultural generalizability of these findings, translations of the Revised NEO Personality Inventory were administered to samples in Germany, Italy, Portugal, Croatia, and South Korea (N = 7,363). Similar patterns of age differences were seen in each country, for both men and women. Common trends were also seen for the more specific traits that define the major factors. Because these nations differ substantially in culture and recent history, results suggest the hypothesis that these are universal maturational changes in adult personality.

Most people hold beliefs about personality characteristics typical of members of their own and others' cultures. These perceptions of national character may be generalizations from personal experience, stereotypes with a “kernel of truth,” or inaccurate stereotypes. We obtained national character ratings of 3989 people from 49 cultures and compared them with the average personality scores of culture members assessed by observer ratings and self-reports. National character ratings were reliable but did not converge with assessed traits. Perceptions of national character thus appear to be unfounded stereotypes that may serve the function of maintaining a national identity.