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The Estonian NEO-FFI was administered to 2650 Estonian adolescents (1420 girls and 1230 boys) aged from 12 to 18 years and attending 6th, 8th, 10th, or 12th grade at secondary schools all over Estonia. Although the mean levels of personality traits of Estonian adolescents were quite similar to the respective scores of Estonian adults, there was a developmental gap in Agreeableness and Conscientiousness. Three of the five personality dispositions demonstrated a modest cross-sectional change in the mean level of the trait scores: the level of Openness increased and the levels of Agreeableness and Conscientiousness decreased between 12 and 18 years of age. Although the five-factor structure of personality was already recognizable in the sample of 12-year-old children, it demonstrated only an approximate congruence with the adult structure, suggesting that not all children of that age have developed abilities required for observing one's own personality dispositions and for giving reliable self-reports on the basis of these observations. The self-reported personality trait structure matures and becomes sufficiently differentiated around age 14-15 and grows to be practically indistinguishable from adult personality by the age of 16. Personality of adolescents becomes more differentiated with age: along with the growth of mental capacities the correlations among the personality traits and intelligence become smaller.

The present study examined three types of personality change and continuity (mean‐level, individual‐level, and rank‐order stability) over the 2‐year period in a nationally representative longitudinal sample of Estonian adolescents (N = 876) aged 12–18. According to the Reliable Change Index, 82.1% of adolescents maintained the same level on any given personality trait measured by the NEO Five‐Factorial Inventory (NEO‐FFI) indicating that the individual‐level continuity of adolescents did not differ compared to young adults. A reliable increase was found in Openness. Across the five dimensions, the average test–retest correlations were 0.51, 0.56 and 0.67, and the computed biennial stability values were 0.80, 0.83 and 0.89 for age groups 12 → 14, 14 → 16 and 16 → 18 years, respectively. Neither intelligence nor school performance moderated the differential continuity. Copyright © 2006 John Wiley & Sons, Ltd.

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In cross‐national studies, mean levels of self‐reported phenomena are often not congruent with more objective criteria. One prominent explanation for such findings is that people make self‐report judgements in relation to culture‐specific standards (often called the reference group effect), thereby undermining the cross‐cultural comparability of the judgements. We employed a simple method called anchoring vignettes in order to test whether people from 21 different countries have varying standards for Conscientiousness, a Big Five personality trait that has repeatedly shown unexpected nation‐level relationships with external criteria. Participants rated their own Conscientiousness and that of 30 hypothetical persons portrayed in short vignettes. The latter type of ratings was expected to reveal individual differences in standards of Conscientiousness. The vignettes were rated relatively similarly in all countries, suggesting no substantial culture‐related differences in standards for Conscientiousness. Controlling for the small differences in standards did not substantially change the rankings of countries on mean self‐ratings or the predictive validities of these rankings for objective criteria. These findings are not consistent with mean self‐rated Conscientiousness scores being influenced by culture‐specific standards. The technique of anchoring vignettes can be used in various types of studies to assess the potentially confounding effects of reference levels. Copyright © 2011 John Wiley & Sons, Ltd.

Data were collected by the members of the Russian character and personality survey from 39 samples in 33 administrative areas of the Russian Federation. Respondents (N = 7065) identified an ethnically Russian adult or college‐aged man or woman whom they knew well and rated the target using the Russian observer rating version of the Revised NEO Personality Inventory, which measures neuroticism, extraversion, openness to experience, agreeableness and conscientiousness. Factor analyses within samples showed that the factor structure of an international sample combining data from 50 different cultures was well replicated in all 39 Russian samples. Sex differences replicated the known pattern in all samples, demonstrating that women scored higher than men on most of the neuroticism, openness, agreeableness and conscientiousness facet scales. Cross‐sectional analyses demonstrated consistent age differences for four factors: Older individuals compared to younger ones were less extraverted and open but more agreeable and conscientious. The mean levels of traits were similar in all 39 samples. Although in general personality traits in Russians closely followed the universal pattern, some reliable culture‐specific effects were also found that future studies can help interpret. Copyright © 2009 John Wiley & Sons, Ltd.

The Estonian version of the International Personality Item Pool NEO (IPIP-NEO; Goldberg, 1999 ) was administered to 297 participants in parallel with the Estonian version of the NEO-PI-R ( Kallasmaa, Allik, Realo, & McCrae, 2000 ). On average, the EPIP-NEO items were 3 words, 7 syllables, and 18 characters shorter than the NEO-PI-R items. By all relevant psychometrical properties the EPIP-NEO was comparable to the NEO-PI-R. The mean convergent correlation between the facet scales was .73. The scales with shorter and grammatically simpler items tended to have higher internal consistency. In an independent cross-validation sample the initial results were generally replicated. The scales also demonstrated an adequate cross-observer agreement. It is concluded that the EPIP-NEO, as a more readable personality inventory compared to the NEO-PI-R, is suitable for a wider range of samples with different levels of reading skills.