Sociosexuality is usually assessed as the overall orientation toward uncommitted sex, although this global approach may mask unique contributions of different components. In a large online study (N = 2,708) and a detailed behavioral assessment of 283 young adults (both singles and couples) with a 1-year follow-up, the authors established 3 theoretically meaningful components of sociosexuality: past behavioral experiences, the attitude toward uncommitted sex, and sociosexual desire (all measured by a revised version of the Sociosexual Orientation Inventory). Discriminant validity was shown with regard to (a) their factorial structure, (b) sex differences, (c) many established correlates of sociosexuality, and (d) the prediction of observed flirting behavior when meeting an attractive opposite-sex stranger, even down to the level of objectively coded behaviors, as well as (e) the self-reported number of sexual partners and (f) changes in romantic relationship status over the following year. Within couples, the 3 components also showed distinct degrees of assortative mating and distinct effects on the romantic partner. Implications for the evolutionary psychology of mating tactics are discussed.

Personality influences on social relationships and vice versa were longitudinally studied. Personality affected relationships, but not vice versa. After entry to university, 132 students participated for 18 month in a study in which the Big Five factors of personality, the subfactors Sociability and Shyness, and all significant social relationships were repeatedly assessed. A subsample kept diaries of all significant social interactions. After the initial correlation between personality and relationship quality was controlled for, Extraversion and its subfactors, Agreeableness, and Conscientiousness predicted aspects of relationships such as number of peer relationships, conflict with peers, and falling in love. In contrast, relationship qualities did not predict personality traits, and changes in relationship qualities were unrelated to changes in personality traits. Consequences for dynamic-interactionistic views of personality and relationships are discussed.

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.

Personality and social relationships were assessed twice across a 4-year period in a general population sample of 489 German young adults. Two kinds of personality-relationship transaction were observed. First, mean-level change in personality toward maturity (e.g., increase in Conscientiousness and decrease in Neuroticism) was moderated by the transition to partnership but was independent of other developmental transitions. Second, individual differences in personality traits predicted social relationships much better than vice versa. Specifically, once initial correlations were controlled for, Extraversion, Shyness, Neuroticism, self-esteem, and Agreeableness predicted change in various qualities of relationships (especially with friends and colleagues), whereas only quality of relationships with preschool children predicted later Extraversion and Neuroticism. Consequences for the transactional view of personality in young adulthood are discussed.

Using the trait of shyness as an example, the authors showed that (a) it is possible to reliably assess individual differences in the implicitly measured self-concept of personality that (b) are not accessible through traditional explicit self-ratings and (c) increase significantly the prediction of spontaneous behavior in realistic social situations. A total of 139 participants were observed in a shyness-inducing laboratory situation, and they completed an Implicit Association Test (IAT) and explicit self-ratings of shyness. The IAT correlated moderately with the explicit self-ratings and uniquely predicted spontaneous (but not controlled) shy behavior, whereas the explicit ratings uniquely predicted controlled (but not spontaneous) shy behavior (double dissociation). The distinction between spontaneous and controlled behavior was validated in a 2nd study.

Replicability of findings is at the heart of any empirical science. The aim of this article is to move the current replicability debate in psychology towards concrete recommendations for improvement. We focus on research practices but also offer guidelines for reviewers, editors, journal management, teachers, granting institutions, and university promotion committees, highlighting some of the emerging and existing practical solutions that can facilitate implementation of these recommendations. The challenges for improving replicability in psychological science are systemic. Improvement can occur only if changes are made at many levels of practice, evaluation, and reward. Copyright © 2013 John Wiley & Sons, Ltd.

Theoretical considerations regarding the significance of early peer interaction for later development suggest that socially withdrawn children may represent an ‘at risk’ population. An analysis of behavioral, cognitive, and motivational correlates of intra-individual differences in social involvement suggests that social involvement should be treated as a multidimensional concept. I conceive social involvement as the result of two opposing motivational tendencies, social approach and social avoidance, which I assume to be largely independent of each other. Application of this approach to interindividual differences results in at least three subgroups of socially withdrawn children (unsociable, shy, and avoidant ones). Results of the Munich Longitudinal Study on the Genesis of Individual Competencies show that socially withdrawn children indeed represent a heterogeneous group. Among preschool and kindergarten children, unsociable, shy, and avoidant children, as well as children characterized by a high rate of constructive solitary activity, appear to differ considerably in various social-cognitive characteristics.

Bayesian statistical methods are becoming ever more popular in applied and fundamental research. In this study a gentle introduction to Bayesian analysis is provided. It is shown under what circumstances it is attractive to use Bayesian estimation, and how to interpret properly the results. First, the ingredients underlying Bayesian methods are introduced using a simplified example. Thereafter, the advantages and pitfalls of the specification of prior knowledge are discussed. To illustrate Bayesian methods explained in this study, in a second example a series of studies that examine the theoretical framework of dynamic interactionism are considered. In the Discussion the advantages and disadvantages of using Bayesian statistics are reviewed, and guidelines on how to report on Bayesian statistics are provided.