One of the remarkable findings of Roberts and DelVecchio (2000) is that there are practically no differences between personality traits in terms of differential stability. In contrast, some traits, notably extraversion and neuroticism, have been regarded as having a more sure biological component than other traits (Eysenck, 1992). Using the Big Five framework (Digman, 1990), we will examine whether the stability of genetic and environmental effects differs across traits.
