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Post‐apocalyptic scenarios provide the basis for popular television shows, video games, and books. These scenarios may be popular because people have their own beliefs and visions about the apocalypse and the need to prepare. The prevalence of such beliefs might also hold societal relevance and serve as a type of projective test of personality. However, there are no quantitative accounts of post‐apocalyptic or prepping beliefs. As such, we conducted seven studies (Ntotal = 1034) to do so. In Studies 1 and 2, we developed a post‐apocalyptic and prepping beliefs scale, explored its correlates, and confirmed its structure and psychometric properties. In Study 3, we attempted to activate a 'prepper' mindset and further explore the correlates of the new scale. In Studies 4 and 5, we investigated covariations in daily feelings, thoughts, and events, and prepping beliefs. In Studies 6a and 6b, we compared scores from 'real' preppers and to a non‐prepping group. Overall, we found that post‐apocalyptic concerns and prepping beliefs are predictive of low agreeableness and humility, paranoia, cynicism, conspiracy mentality, conservatism, and social dominance orientation. We also found that increased belief in the need to prep is associated with God‐belief, negative daily experiences, and global political events. © 2019 European Association of Personality Psychology [ABSTRACT FROM AUTHOR]

In this target article, we argue that personality processes, personality structure, and personality development have to be understood and investigated in integrated ways in order to provide comprehensive responses to the key questions of personality psychology. The psychological processes and mechanisms that explain concrete behaviour in concrete situations should provide explanation for patterns of variation across situations and individuals, for development over time as well as for structures observed in intra-individual and inter-individual differences. Personality structures, defined as patterns of covariation in behaviour, including thoughts and feelings, are results of those processes in transaction with situational affordances and regularities. It cannot be presupposed that processes are organized in ways that directly correspond to the observed structure. Rather, it is an empirical question whether shared sets of processes are uniquely involved in shaping correlated behaviours, but not uncorrelated behaviours (what we term 'correspondence' throughout this paper), or whether more complex interactions of processes give rise to population-level patterns of covariation (termed 'emergence'). The paper is organized in three parts, with part I providing the main arguments, part II reviewing some of the past approaches at (partial) integration, and part III outlining conclusions of how future personality psychology should progress towards complete integration. Working definitions for the central terms are provided in the appendix. [ABSTRACT FROM AUTHOR]

Do individual differences in personality traits become more or less pronounced over childhood and adolescence? The present research examined age differences in the variance of a range of personality traits, using parent reports of two large samples of children from predominantly the USA and Russia, respectively. Results indicate (i) that individual differences in most traits tend to increase with age from early childhood into early adolescence and then plateau, (ii) that this general pattern of greater personality variance at older childhood age is consistent across the two countries, and (iii) that this pattern is not an artefact of age differences in means or floor/ceiling effects. These findings are consistent with several (noncontradictory) developmental mechanisms, including youths' expanding behavioural capacities and person-environment transactions (corresponsive principle). However, these mechanisms may predominantly characterize periods before adolescence, or they may be offset by countervailing processes, such as socialization pressure towards a mature personality profile, in late adolescence and adulthood. Finally, the findings also suggest that interpreting age trajectories in mean trait scores as pertaining to age differences in a typical person may sometimes be misleading. Investigating variance should become an integral part of studying personality development. Copyright © 2017 European Association of Personality Psychology [ABSTRACT FROM AUTHOR]

In contrast to mean-level comparisons, age group differences in personality trait variance have received only passing research interest. This may seem surprising because individual differences in personality characteristics are exactly what most of personality psychology is about. Because different proposed mechanisms of personality development may entail either increases or decreases in variance over time, the current study is exploratory in nature. Age differences in variance were tested by comparing the standard deviations of the five-factor model domain and facet scales across two age groups (20 to 30 years old versus 50 to 60 years old). Samples from three cultures (Estonia, the Czech Republic and Russia) were employed, and two methods (self-reports and informant-reports) were used. The results showed modest convergence across samples and methods. Age group differences were significant for 11 of 150 facet-level comparisons but never consistently for the same facets. No significant age group differences were observed for the five-factor model domain variance. Therefore, there is little evidence for individual differences in personality characteristics being systematically smaller or larger in older as opposed to younger people. We discuss the implications of these findings for understanding personality development. Copyright © 2015 European Association of Personality Psychology [ABSTRACT FROM AUTHOR]

To increase predictive accuracy at no extra cost, life outcomes including job performance can be predicted from individual questionnaire items in addition to or even instead of composite trait scores. Items can be conceived as markers of 'persome' (the universe of behavioural, affective, cognitive and motivational variance among people), like individual genetic variants track genomic variance. Ideally, comprehensive item pools are used to capture persomic variance, but items of existing questionnaires can also provide incremental predictive accuracy. Item-level associations may reveal that outcomes are highly poly-causal. [ABSTRACT FROM AUTHOR]

ABSTRACT Introduction. Stable individual differences in personality traits have well-documented associations with various aspects of health. One of the health outcomes that directly depends on people's behavioral choices, and may therefore be linked to personality traits, is having a sexually transmitted disease (STD). Aim. The study examines the associations between a comprehensive set of basic personality traits and past STD history in a demographically diverse sample. Methods. Participants were 2,110 Estonians (1,175 women) between the ages of 19 and 89 (mean age 45.8 years, SD = 17.0). The five-factor model personality traits (Neuroticism, Extraversion, Openness to Experience, Agreeableness, and Conscientiousness) and their specific facets were rated by participants themselves and knowledgeable informants. Sex, age, and educational level were controlled for. Main Outcome Measure. History of STD diagnosis based on medical records and/or self-report. Results. History of STD diagnosis was associated with higher Neuroticism and lower Agreeableness in both self- and informant-ratings. Among the specific personality facets, the strongest correlates of STD were high hostility and impulsiveness and low deliberation. Conclusions. Individual differences in several personality traits are associated with a history of STD diagnosis. Assuming that certain personality traits may predispose people to behaviors that entail a higher risk for STD, these findings can be used for the early identification of people at greater STD risk and for developing personality-tailored intervention programs. Mõttus R, Realo A, Allik J, Esko T, and Metspalu A. History of the diagnosis of a sexually transmitted disease is linked to normal variation in personality traits. J Sex Med 2012;9:2861-2867. [ABSTRACT FROM AUTHOR]

Abstract: We tested the associations between individual differences in the Big Five personality traits and their changes over the ninth decade of life and levels of and changes in cognitive functioning, physical fitness, and everyday functioning. Besides mean-level changes in personality traits, there were significant individual differences in their rates of change between ages 81 and 87. The changes in the Big Five traits were not strongly intercorrelated, suggesting little common influence on personality change. Lower IQ at age 79 predicted lower Intellect and higher Extraversion, and more decline in Conscientiousness from ages 81 to 87. Also, decreases in physical fitness were associated with declines in Conscientiousness. [Copyright &y& Elsevier]

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. [ABSTRACT FROM AUTHOR]

Abstract: It is widely believed that, on those personality traits that are more visible to an external observer, two judges will reach a higher level of agreement than on those traits that are more difficult to judge. This view is challenged in the current paper, using a sample of 672 participants in the age range of 18–87years who described their own personality and were judged by an external observer who knew them well, using the NEO PI-3 questionnaire (). The self-observer agreement on the 30 personality subscales varied from .38 (O3: Feelings) to .57 (E5: Excitement Seeking). Approximately one-half of the variance in the agreement level was explained by the standard deviation of the sum scores of these subscales: self-observer agreement was higher in the subscales on which individual differences were larger. After correction for the range of variance, differences in self-observer agreement substantially diminished. It is proposed that judges who know each other well reach an approximately equal level of agreement on all the Big Five personality traits. [ABSTRACT FROM AUTHOR]

Abstract: If you are an accurate judge of your friends’ openness, are you also good at rating their conscientiousness? In this paper we examined how well self–other agreement on one personality trait accords with self–other agreement on other personality traits. Data from four Estonian and Belgian samples containing 818 targets and 1281 knowledgeable raters were analyzed. Results demonstrated that self–other agreement only moderately generalizes from one personality trait to another suggesting that the predictability of an individual can vary for different personality traits. When trait agreement was decomposed into the contributions of individual pairs of raters, these were only moderately correlated with different coefficients of profile agreement, suggesting that these two forms of agreement are far from being identical. [Copyright &y& Elsevier]