Dissecting the genetic architecture of human personality

The first candidate gene studies of human personality promised much but, in the fifteen years since their publication, have delivered little in the way of clear evidence for the contribution of specific genetic variants to observed variation in personality traits. This is most likely due to the very small effects conferred by individual loci. The advent of genome-wide association studies has brought growing awareness that high levels of statistical stringency, very large sample sizes, and independent replication will be minimum requirements for future genetic studies of personality. At the same time, evidence from other fields indicates that the genetic architecture of personality is likely to consist of the combined effect of many hundreds, if not thousands, of small effect loci.     

The use of dreams in the clinical context: convergencies and divergencies: an interdisciplinary proposal

This paper aims to define some unexpected convergences and foreseeable divergences regarding the conceptualization of dreams and their use as a research tool, specifically in clinical practice with non-neurotic patients. It includes a concise review of different lines of thought on the vicissitudes of dreams throughout the history of psychoanalysis: from their initial conception up to their use to examine transference and relational aspects in the context of a psychoanalytic process. The idea of the merely evacuative function of dreams from patients in certain diagnostic categories is discussed and compared with that of their potential communicative value. Lastly, the essay sets forth an interdisciplinary semiotic-pragmatic approach to the function of dreams and their clinical and technical use in the context of the intersubjective dynamic field. Based on the hypothesis that dreams related in the session are communicative signs, this proposal argues their significance as a symbolic matrix that generates processes of psychic semiosis. To do so, it combines certain lines of psychoanalytic thought with ideas coming from C. S. Peirce's analytic semiotics. Clinical material is included to illustrate this viewpoint.     

Body weight increase in expectant males and helpers of cotton-top tamarin (Saguinus oedipus): a symptom of the Couvade syndrome?

In the cooperative breeding system of cotton-top tamarin (TCB; Saguinus oedipus) males gain weight during the last months of pregnancy of their partners as a way to cope with energy costs of reproduction. This phenomenon was described only in humans as a symptom of . As after infants' birth, TCB male and female helpers lose weight, the same as fathers do, it might be expected that previously, they also gain weight. In 8 groups of TCB, we explored body weight changes of the three categories of individuals, in periods of six months, under three different reproductive conditions: control (no pregnancy and without offspring), pregnancy (pregnancy and without offspring), and raising (with offspring). We found that across pregnancy, TCBs increase their weight in the last trimester of that period while across breeding TCBs reduce their weight in the first trimester. Expectant males and also helpers could be preparing during pregnancy in relation to the weight losses they experience when raising their young.     

Sex differences in left-handedness: a meta-analysis of 144 studies

Human handedness, a marker for language lateralization in the brain, continues to attract great research interest. A widely reported but not universal finding is a greater male tendency toward left-handedness. Here the authors present a meta-analysis of k = 144 studies, totaling N = 1,787,629 participants, the results of which demonstrate that the sex difference is both significant and robust. The overall best estimate for the male to female odds ratio was 1.23 (95% confidence interval = 1.19, 1.27). The widespread observation of this sex difference is consistent with it being related to innate characteristics of sexual differentiation, and its observed magnitude places an important constraint on current theories of handedness. In addition, the size of the sex difference was significantly moderated by the way in which handedness was assessed (by writing hand or by other means), the location of testing, and the year of publication of the study, implicating additional influences on its development.     

Organizational identification and “currencies of exchange”: integrating social identity and social exchange perspectives

We integrate social exchange and social identity perspectives to propose and test the prediction that depending on their level of organizational identification, people may reciprocate the received organizational support using different “currencies of exchange”—reducing turnover intentions or, instead, engaging in extra‐role behavior. Specifically, the relationship of perceived organizational support (POS) with turnover intentions is proposed to be stronger with lower identification, whereas POS is proposed to be more closely related to extra‐role behavior with higher organizational identification. These predictions were supported in a cross‐sectional survey of N = 1,000 employees of a financial services firm. These results speak to the added value of integrating the social exchange perspective with its roots in applied psychology and the social identity perspective with its roots in social psychology in understanding the employee‐organization relationship.     

Argentine validation of the Purpose in Life Test / Validación argentina del Test de Propósito en la Vida

Despite the fact that the Purpose in Life Test developed by James Crumbaugh and Leonard Maholick in the 1960s is considered to be one of the most commonly used measures in positive psychology, there are no validations of it into the Argentine context. This paper aims to assess the psychometric properties of PIL in a sample of 336 university students residing in Buenos Aires. The results suggest that PIL has adequate psychometric properties for the Argentine context. The confirmatory factor analysis presents a good fit of the data as proposed by the authors. These results favour the assessment of psychological well-being in this local context. Future studies should use different samples in order to provide more robust support to the construct.     

The Emotion Regulation Strategies of Adolescents and their Parents: An Experience Sampling Study

Parents are the main socialization agents in the development of emotion regulation (ER). In this study, we evaluated adolescents’ and their respective parents’ perspectives about their use of two ER strategies (cognitive reappraisal and expressive suppression) in daily life. In addition, we evaluated the within-family associations between adolescents’ and their parents’ use of strategies. We controlled for adolescents’ gender and age and the perceived quality of their relationships with their parents (mothers and fathers). The sample consisted of 33 12- to 18-year-old adolescent–father–mother triads, totaling 99 participants. Parents and adolescents reported their use of ER strategies in response to eight random prompts throughout the day, by means of the experience sampling method for 1 week. Participants provided 4082 reports on their momentary experiences. The data were analyzed using multilevel modeling to account for the hierarchical structure of the repeated daily assessments. The significant association between parents’ and adolescents’ use of ER strategies was specific to mother–adolescent dyads. The significant association between adolescents’ and their mothers’ ER strategies varied as a function of the adolescents’ age and the quality of their relationship with their mothers according to adolescents’ reports, but not as a function of adolescent gender. These findings suggest that mothers have a role in their adolescents’ emotion regulation in a developmental period characterized by autonomy from parental guidance.