Children’s tactics of mate choice manipulation: Exploring sex differences and personality effects

Parents do not always agree with their children’s mating decisions, and so they attempt to manipulate them in accepting mates of their choice and in terminating relationships with undesirable ones. Children engage in counter-manipulation in order to avoid undesirable mates to be imposed on them and to persuade their parents to accept the mates they have chosen. This paper aims to identify the main factors that predict the tactics that children use on their parents. In particular, three hypotheses are tested, namely the use of manipulation tactics is predicted by the personality of children, by the sex of children and by the sex of parents. Evidence from two independent studies finds support for the first two hypotheses, but no support for the third hypothesis. The implications of these findings are further discussed.     

The Performance of Multivariate Methods for Two-Group Comparisons with Small Samples and Incomplete Data

Abstract

In intervention studies having multiple outcomes, researchers often use a series of univariate tests (e.g., ANOVAs) to assess group mean differences. Previous research found that this approach properly controls Type I error and generally provides greater power compared to MANOVA, especially under realistic effect size and correlation combinations. However, when group differences are assessed for a specific outcome, these procedures are strictly univariate and do not consider the outcome correlations, which may be problematic with missing outcome data. Linear mixed or multivariate multilevel models (MVMMs), implemented with maximum likelihood estimation, present an alternative analysis option where outcome correlations are taken into account when specific group mean differences are estimated. In this study, we use simulation methods to compare the performance of separate independent samples t tests estimated with ordinary least squares and analogous t tests from MVMMs to assess two-group mean differences with multiple outcomes under small sample and missingness conditions. Study results indicated that a MVMM implemented with restricted maximum likelihood estimation combined with the Kenward–Roger correction had the best performance. Therefore, for intervention studies with small N and normally distributed multivariate outcomes, the Kenward–Roger procedure is recommended over traditional methods and conventional MVMM analyses, particularly with incomplete data.     

Effect of tDCS on Fine Motor Control of Patients in Subacute and Chronic Post-Stroke Stages

Abstract

In this study we compared the effects of transcranial direct current stimulation (tDCS) in the subacute and chronic stages of post-stroke recovery. Anodal/sham tDCS was applied to the primary motor cortex of stroke patients in these stages of recovery in a cross-over design. The Jebsen–Taylor hand function test was employed. The repeated-measure ANOVA showed significant influence of the stimulation type and test performance time (during/after tDCS) with no overall influence of recovery stage. The interaction TYPE*TIME*STAGE was significant. The effect after anodal tDCS in the subacute stage was significantly higher compared to the effects in all relevant conditions including the chronic stage. Therefore, tDCS treatment in the subacute stage of recovery can be superior, at least for some patients, to treatment in the chronic stage.     

Please accept my sincere and humble apologies: The HEXACO model of personality and the proclivity to apologize

We investigated the links of the HEXACO personality factors and facets with the proclivity to apologize for transgressions, using self- and observer-reports of personality in two adult samples. The proclivity to apologize showed its strongest correlations with the honesty–humility factor, whether evaluated by the self or a knowledgeable observer. Agreeableness was a positive correlate of the proclivity to apologize in one sample only. In both samples, self-reported conscientiousness was positively associated with a proclivity to apologize. We also obtained self-reports on the guilt and shame proneness scales, given the strong conceptual link between guilt and apology. The proclivity to apologize was associated positively with facets of guilt (especially Negative Behavior Evaluation) but negatively with one facet of Shame (Withdrawal).