Closeness in Young Adult Sibling Relationships: Affective and Physiological Processes

The Negative Effect of Siblings on Perspective-Taking in Adulthood under Chinese Culture

Evidence from Western developed countries has consistently found that children with sibling(s) showed better perspective-taking (PT) than only children. However, this was not the case in developing countries like China. Our study investigates whether the potentially hindering effect of having sibling(s) on PT persists into adulthood within the context of contemporary Chinese culture. We employed self-report questionnaires to measure PT, perceived parental care, and sibling relationships among Chinese young adults (21.93 ± 2.35 years old). Our findings indicate that in China, (1) having sibling(s) hinders individuals' PT in adulthood, (2) a potential mechanism for this effect is that having sibling(s) leads individuals to perceive less parental care during early life, and (3) for those with sibling(s), higher sibling intimacy can enhance PT, particularly among older sister-younger brother pairs. These results suggest that in developing countries such as China, while sibling(s) may diminish PT to some extent, factors like parental care and sibling intimacy can serve as protective factors that mitigate the negative impacts of sibling(s) on PT.

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.

Conflict Resolution and Emotional Expression in Sibling and Mother-Adolescent Dyads: Within-Family and Across-Context Similarities

Early adolescents (aged 12-15) were observed during dyadic conflict discussions with their siblings ( n = 23) and mothers ( n = 32) in their homes. The verbal conflict behaviors and affect of family members were coded continuously. Sequential analyses identified temporal associations between individuals’ affect and their own and their partners’ verbal conflict behaviors. In addition, within-family and across-context similarities in behavior were examined. Results revealed that while many links between emotion and behavior were consistent with previous research (e.g., attack/assert when frowning/upset, withdraw/concede when sad), several differences emerged depending on the relationship (sibling vs. mother-adolescent) and position in the family (e.g., adolescent vs. mother). Furthermore, many within-family similarities were observed in responses to emotion, while adolescents showed few similarities in their behavior across contexts. Results are discussed in relation to the developmental context of early adolescence and family systems theory.

Geographic proximity is associated with transmission of suicidal behaviour among siblings

OBJECTIVE

The aim of this study was to clarify the role of 'contagion', or social transmission, in risk of suicidal behaviour (SB) among siblings.

METHODS

We followed Swedish sibling pairs until one of them (S1; N = 111,848) was registered for a suicide attempt or completion. We tested the effect of geographic proximity between siblings on risk of a first SB registration of S1's sibling (S2). To control for familial confounding, we conducted complementary analyses of sibling trios (N = 701), comparing risk in different siblings as a function of their respective proximity to S1.

RESULTS

The best-fitting model across sibling pairs included an effect of distance between siblings (HR = 0.96, 95% CI = 0.93-0.99). Hazard ratios declined quickly up to 25 km and largely stabilized beyond 150 km. Across all pairs, a larger age difference between siblings was associated with reduced SB risk (HR = 0.96 95% CI = 0.93-0.98). Findings were consistent within the sibling trios.

CONCLUSIONS

Consistent with the concept of suicide contagion, risk of suicidal behaviour subsequent to a sibling's suicide completion or attempt is higher as a function of sibling closeness. These findings are robust to potentially confounding familial factors.

"Can't live with or without them:" Transitions and young adults' perceptions of sibling relationships

Extant research documents how siblings' relationships develop from childhood through adolescence; yet, we know little about how sibling relationships change in young adulthood. Rooted in life course theory, this 2-wave longitudinal study investigated changes in sibling closeness and conflict, and the roles of life transitions and sibling similarity in life stage. Participants included 273 young adults from 180 families who reported on 340 sibling relationships (Time 1 M age = 24.45, SD = 5.33; Time 2 M age = 30.23, SD = 5.33). Multilevel repeated measures analysis of covariance indicated that, on average, siblings' perceptions of conflict declined over the course of young adulthood. Additionally, patterns of change in closeness and conflict were linked to life transitions surrounding coresidence, parenthood, and similarity in employment. The discussion addresses findings in regard to life course theory and similarity in life transitions. (PsycINFO Database Record

Variance Distribution in Sibling Relationships: Advantages of Multilevel Modeling Using Full Sibling Groups

The majority of research on sibling relationships has investigated only one or two siblings in a family, but there are many theoretical and methodological limitations to this single dyadic perspective. This study uses multiple siblings (541 adults) in 184 families, where 96 of these families had all siblings complete the study, to demonstrate the value in including full sibling groups when conducting research on sibling relationships. Two scales, positivity and willingness to sacrifice, are evaluated with a multilevel model to account for the nested nature of family relationships. The distribution of variance across three levels: relationship, individual, and family are computed, and results indicate that the relationship level explains the most variance in positivity, whereas the individual level explains the majority of variance in willingness to sacrifice. These distributions are affected by gender composition and family size. The results of this study highlight an important and often overlooked element of family research: The meaning of a scale changes based on its distribution of variance at these three levels. Researchers are encouraged to be cognizant of the variance distribution of their scales when studying sibling relationships and to incorporate more full sibling groups into their research methods and study design.

Family Relationships From Adolescence to Early Adulthood: Changes in the Family System Following Firstborns' Leaving Home

This study charted the course of parent-child and sibling relationships from early adolescence to early adulthood and examined how these relationships changed following firstborns' departure from their parents' home for the first time. Data were drawn from a 10-year longitudinal study of family relationships. Participants included mothers, fathers, and first- and second-born children from 184, White, working and middle class families. Multilevel models revealed declines in parent-child conflict, acceptance, and sibling negativity, and increases or U-shaped patterns in sibling and parent-child intimacy over time. Birth order X leaving home interactions revealed that firstborns' leaving home related to changes in family relationship qualities for both first- and second-borns, with relationships improving for firstborns and no changes or declines in relationship quality for second-borns. Overall, the results highlight the inter-relatedness of family subsystems.

Military trauma and social development: The moderating and mediating roles of peer and sibling relations in mental health

We first examined how war-related traumatic events impact on peer and sibling relations, and how the quality of these relations in turn are associated with children’s mental health, indicating a mediation model. Second, we tested the moderating (protective) effects of good peer and sibling relations in attenuating the link between trauma and mental health. The participants were 227 Palestinian boys and girls aged 10—14 years living in the Gaza Strip. They reported\ their exposure to military trauma, evaluated the qualities of peer relationships (loneliness and friendship) and siblingship (warmth, intimacy, conflict and rivalry), and reported symptoms of PTSD, CDI depression and SDQ psychological distress. The results show that exposure to military trauma was associated with intense rivalry in sibling relations and with low friendship quality especially among girls and younger children. The association between military trauma and symptoms was mediated by poor friendship and rivaling sibling relations. Only sibling relations but not peer relations had a moderating effect, as military trauma was not associated with severe symptoms among children who enjoyed considerable intimacy and warmth and lacked rivalry in their siblingships. We discuss theoretical and practical implications of the roles of peer and sibling relations in helping children in traumatic war conditions.

Sibling Relationships during the Transition to Adulthood

Recent research has shed new light on individual development during the early adulthood years, yet few investigators have examined sibling relationships during this stage of life. These relationships undergo transformations as individuals enter adult roles and orient their lives towards friends and romantic partners and establish independence from parents and siblings. This review examines major life events and role transitions such as leaving home, completing school, obtaining employment, getting married, and having children that influence individuals and their sibling relationships. In addition, the review considers how sibling relationships may affect individuals during the transition to adulthood, and considers the context of family and culture. The article concludes with suggestions for future research on sibling relationships during early adulthood and beyond.

Sibling differentials in power and memory conformity

How much a person conforms to another person's memory report can depend on the power and credibility of this person, even if these factors are manipulated by the experimenter. The aim of the current study was to establish whether memory conformity is also affected by power in pairs involving natural power differentials, in this case siblings. Pairs of adult siblings were shown 50 photographs of faces and then given a recognition test where one partner had to answer before the other. The findings showed that what one sibling reported affected what the other one reported. Contrary to our expectations, however, there was no significant difference in conformity between the younger and the older sibling. The implications of these findings are discussed.