Sibling Relations in Patchwork Families: Co-residence Is More Influential Than Genetic Relatedness

The role of dominance in sibling relationships: differences in interactive cooperative and competitive behavior

Siblings strongly influence each other in their social development and are a major source of support and conflict. Yet, studies are mostly observational, and little is known about how adult sibling relationships influence social behavior. Previous tasks exploring dynamically adjusting social interactions have limitations in the level of interactivity and naturalism of the interaction. To address these limitations, we created a cooperative tetris puzzle-solving task and an interactive version of the chicken game task. We validated these two tasks to study cooperative and competitive behavior in real-time interactions (N = 56). Based on a dominance questionnaire (DoPL), sibling pairs were clustered into pairs that were both low in dominance (n = 7), both high in dominance (n = 8), or one low and one high in dominance (n = 13). Consistent with our hypothesis, there were significantly more mutual defections, less use of turn-taking strategies, and a non-significant trend for reduced success in solving tetris puzzles together among high dominance pairs compared to both other pair types. High dominant pairs also had higher Machiavellian and hypercompetitiveness traits and more apathetic sibling relationships. Both tasks constitute powerful and reliable tools to study personality and relationship influences on real and natural social interactions by demonstrating the different cooperative and competitive dynamics between siblings.

Domestic Abuse Sibling studY (DASY): a multimethod study protocol

INTRODUCTION

Domestic violence and abuse (DVA) is an everyday aspect of many children and young people's lives, both in the home and in their own relationships. Studies estimate that up to one million children and young people experience some form of DVA each year in the UK. Although the majority of families experiencing DVA have more than one child, most research to date has focused on individual children within these families. This study aims to explore the views of practitioners, parent/carers and young people on sibling responses in the context and aftermath of DVA. Our protocol has followed SPIRIT guidelines.

METHODS AND ANALYSIS

We propose a multimethod study consisting of semistructured interviews, the completion of Sibling Relationship Questionnaires, photovoice interviews and illustrative case studies to explore sibling experiences in the context and aftermath of DVA. A purposive sample of front-line practitioner participants will be recruited and interviewed first. We will ask them to introduce us to parent/carer and young people participants using a snowball approach (n=70). Qualitative data will be analysed through reflexive thematic analysis, theoretically underpinned by critical realism, to explore patterns in participants' views and experiences of siblings in the context and aftermath of DVA. Quantitative data collected from the Sibling Relationship Questionnaire's four domains (warmth/closeness, power/status, conflict and rivalry) will be analysed. Data triangulation of the quantitative and qualitative data within this study will occur at the results interpretation stage.

ETHICS AND DISSEMINATION

Ethical approval has been obtained from the University of Birmingham Research Ethic Committee (ERN_21-0795). Findings will be published in open access peer-reviewed journals and presented at relevant conferences and events. Child-facing infographics and front-line practitioner guides will also be produced.

Sibling relationship quality and parental rearing style influence the development of Dark Triad traits

Currently our understanding of environmental factors that influence the development of dark personality traits (DT) is limited. Therefore, we conducted three studies using online questionnaires, each examining a different aspect of the relation between dark personality traits and family environment. In Study 1, 117 adults (mean age: 30.36 years, SD = 10.19) filled out questionnaires regarding their childhood relationship with siblings and their own DT traits. We found that the amount of conflicts with siblings during adolescence correlated positively with Machiavellianism and psychopathy. The feeling of closeness towards the siblings showed negative correlation with Machiavellianism. Parental partiality towards the other sibling was positively correlated with narcissism. In Study 2, 111 adolescents (mean age: 15.92, SD = 1.24) reported their perceptions of the rearing style of their parents, in addition to their sibling relationships and DT traits. Perceived parental emotional warmth was negatively associated, whereas both rejection and overprotection were positively correlated with psychopathy. Parental warmth was positively, while rejection negatively associated with narcissism. Machiavellianism was positively associated with the amount of conflicts with siblings, but negatively with closeness to siblings. In Study 3, 110 adults (mean age: 32.62 years, SD = 12.25) reported their levels of the Vulnerable Dark Triad that included measures of primary and secondary psychopathy, maladaptive covert narcissism, and borderline personality organization. Results indicated that sibling relation quality had a significant effect on primary psychopathy and borderline traits. Parental rejection and overprotection correlated with borderline traits and vulnerable narcissism. The results of these studies shed some light on how environmental impulses, particularly the quality of relationships between family members, affect the development of personality.