Sibling relationship#marriage

The content and context of sibling relationships varies between cultures.Cicirelli, V. G. (1995) Sibling relationships across the life span. New York: Plenum Press. In industrialized cultures, sibling relationships are typically discretionary. People are encouraged to stay in contact and cooperate with their brothers and sisters, but this is not an obligation. Older siblings in these cultures are sometimes given responsibilities to watch over a younger sibling, but this is only occasional, with parents taking on the primary role of caretaker. In contrast, close sibling relationships in nonindustrialized cultures are often obligatory, with strong cultural norms prompting cooperation and close proximity between siblings. In India, the brother-sister sibling relationship is so cherished that a festival is held in observance called Raksha Bandhan. At this celebration, the sister presents the brother with a woven bracelet to show their lasting bond even when they have raised their own families.{{cite book|last1=Verma|first1=Suman|last2=Saraswathi|first2=T.S.|title=Adolescence in India|page=110}} These cultures also extend caregiving roles to older siblings, who are constantly expected to watch over younger siblings.

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A relationship begins with the introduction of two siblings to one another. Older siblings are often made aware of their soon-to-be younger brother or sister at some point during their mother's pregnancy, which may help facilitate adjustment for the older child and result in a better immediate relationship with the newborn.Dunn, J., & Kendrick, C., (1982). "Siblings: Love, envy, and understanding." Campbridge, MA: Harvard University Press. Parents pay attention not only to the newborns but to the older children to avoid sibling rivalry; interactions that can contribute to the older sibling's social aptitude can cognitively stimulate the younger sibling.Teti, D.M. (1992). Sibling interaction. In V.G. Van Hasselt & M. Hersen (Eds.), "Handbook of social development: A lifespan perspective" (pp. 201–226). New York: Plenum Press. Older siblings even adapt their speech to accommodate for the low language comprehension of the younger sibling, much like parents do with baby talk.Ervin-Tripp, S. (1989). Sisters and brothers. In P.G. Zukow (Ed.), "Sibling interaction across cultures: Theoretical and methodological issues" (pp. 184–195). New York: Springer-Verlag.

The attachment theory used to describe an infant's relationship to a primary caregiver may also be applied to siblings. If an infant finds an older sibling to be responsive and sees him or her as a source of comfort, a supportive bond may form.Bretherton, I. (1992). Attachment and bonding. In V. G. Van Hasselt & M. Hersen (Eds.), "Handbook of social development: A lifespan perspective" (pp. 13–155). New York: Basic Books. On the contrary, a negative bond may form if the older sibling acts in an aggressive, neglectful, or otherwise negative manner. Sibling attachment is further accentuated in the absence of a primary caregiver when the younger sibling must rely on the older one for security and support.Stewart, R. B., & Marvin, R. S. (1984) Sibling relations: The role of conceptual perspective taking in the ontogeny of sibling caregiving. "Child Development, 55", 1322–1332.

Even as siblings age and develop, their relationships have considerable stability from infancy through middle childhood, during which positive and negative interactions remain constant in frequency.Dunn, J. (1992) Introduction. In F. Boer & J. Dunn (Eds.), "Children's sibling relationships: Developmental and clinical issues" (pp. xiii–xvi). Hillsdale, NJ: Erlbaum Still, this time period marks great changes for both siblings. Assuming an age gap of only a few years, this marks the time when the older sibling is beginning school, meeting peers, and making friends. This shift in environment reduces both children's access to one another and depletes the older sibling's dependency on the younger for social support, which can now be found outside the relationship. When the younger sibling begins school, the older sibling may help him or her become acclimated and advise on the new struggles that come with being a student. At the same time, the older sibling is also available to answer questions and discuss topics that the younger sibling may not feel comfortable bringing up with a parent.Bryant, B.K. (1992). Sibling caretaking: Providing emotional support during middle childhood. In F. Boer & J. Dunn (Eds.), "Children's sibling relationships: Developmental and clinical issues" (pp. 55–69). Hallsdale, NJ: Lawrence Elbaum Associates

The nature of sibling relationships changes from childhood to adolescence. While young adolescents often provide one another with warmth and support,Lempers, J., & Clark-Lempers, D. (1992). Young, middle, and late adolescents' comparisons of the functional importance of five significant relationships. "Journal of Youth and Adolescence, 21", 53–96. this period of development is also marked by increased conflictBrody, G., Stoneman, Z., & McCoy, J. (1994). Forecasting sibling relationships in early adolescence from child temperaments and family processes in middle childhood. "Child Development, 65", 771–784. and emotional distance.Buhrmester, D., & Furman, W. (1990). Perceptions of sibling relationships during middle childhood and adolescence. "Child Development, 61", 1387–1396. However, this effect varies based on the sex of siblings. Mixed-sex sibling pairs often experience more drastic decreases in intimacy during adolescence, while same-sex sibling pairs experience a slight rise in intimacy during early adolescence followed by a slight drop.Kim, J., McHale, S.M., Osgood, D.W., & Crouter, A.C. (2006). Longitudinal course and family correlates of sibling relationships from childhood through adolescence. "Child Development, 77", 1746–1761. In both instances, intimacy once again increases during young adulthood. This trend may be the result of an increased emphasis on peer relationships during adolescence. Often, adolescents from the same family adopt differing lifestyles which further contributes to emotional distance between one another.Cicirelli, V. G. (1994). "Sibling relationships over the life course." Paper presented at the 49th Annual Scientific Meeting of the Gerontological Society of America, Atlanta.

Siblings may influence one another in much the same way that peers do, especially during adolescence. These relationships may even compensate for the negative psychological impact of not having friendsEast, P. (2009). Adolescents' relationships with siblings. In R. Lerner & L. Steinberg (Eds.), "Handbook of adolescent psychology" (3rd ed., Vol. 2, pp. 43–73). New York: Wiley. and may provide individuals with a sense of self-worth.Yeh, H., & Lempers, J.D. (2004). Perceived sibling relationships and adolescent development. "Journal of Youth and Adolescence, 33", 133–147. Older siblings can effectively model good behaviour for younger siblings. For instance, there is evidence that communication about safe sex with a sibling may be just as effective as with a parent.Kowal, A. & Blinn-Pike, L., (2004). Sibling influences on adolescents' attitudes toward safe sex practices. "Family Relations, 53", 377–384. Conversely, an older sibling may encourage risky sexual behaviour by modelling a sexually advanced lifestyle, and younger siblings of teen parents are more likely to become teen parents themselves.

Research on adolescents suggests positive sibling influences can promote healthy and adaptive functioning{{cite journal | last1 = East | first1 = P.L. | last2 = Rook | first2 = K.S. | year = 1992 | title = ). Compensatory patterns of support among children' s peer relationships: A test using school friends, nonschool friends, and siblings | journal = Developmental Psychology | volume = 28 | issue = 1| pages = 163–172 | doi = 10.1037/0012-1649.28.1.163 | pmid = 25067850 | pmc = 4108171 }}{{cite journal | last1 = Stocker | first1 = C.M. | year = 1994 | title = Children' s perceptions of relationships with siblings, friends, and mothers: Compensatory processes and links with adjustment | journal = Journal of Child Psychology and Psychiatry | volume = 35 | issue = 8| pages = 1447–1459 | doi = 10.1111/j.1469-7610.1994.tb01286.x | pmid = 7868639 }}{{cite journal | last1 = Tucker | first1 = C.J. | last2 = Updegraff | first2 = K.A. | last3 = McHale | first3 = S.M. | last4 = Crouter | first4 = A.C. | year = 1999 | title = ). Older siblings as socializers of younger siblings ' empathy | journal = Journal of Early Adolescence | volume = 19 | issue = 2| pages = 176–198 | doi = 10.1177/0272431699019002003 | s2cid = 146524021 }} while negative interactions can increase vulnerabilities and problem behaviours.{{cite journal | last1 = Bank | first1 = L. | last2 = Burraston | first2 = B. | last3 = Snyder | first3 = J. | year = 2004 | title = Sibling conflict and ineffective parenting as predictors of adolescent boys' antisocial behavior and peer difficulties: Additive and interactional effect | journal = Journal of Research on Adolescence | volume = 14 | pages = 99–125 | doi = 10.1111/j.1532-7795.2004.01401005.x }}{{cite journal | last1 = Criss | first1 = M.M. | last2 = Shaw | first2 = D.S. | year = 2005 | title = Sibling relationships as contexts for delinquency training in low - income families | journal = Journal of Family Psychology | volume = 19 | issue = 4| pages = 592–600 | doi = 10.1037/0893-3200.19.4.592 | pmid = 16402874 }} Intimate and positive sibling interactions are an important source of support for adolescents and can promote the development of prosocial behaviour.{{cite journal | last1 = Brody | first1 = G.H. | year = 2004 | title = Siblings' direct and indirect contributions to child development | journal = Current Directions in Psychological Science | volume = 13 | issue = 3| pages = 124–126 | doi = 10.1111/j.0963-7214.2004.00289.x | s2cid = 145435845 }} However, when sibling relationships are characterized by conflict and aggression, they can promote delinquency, and antisocial behaviour among peers.{{cite journal | last1 = Snyder | first1 = J. | last2 = Bank | first2 = L. | last3 = Burraston | first3 = B. | year = 2005 | title = The consequences of antisocial behavior in older male siblings for younger brothers and sisters | journal = Journal of Family Psychology | volume = 19 | issue = 4| pages = 643–653 | doi = 10.1037/0893-3200.19.4.643 | pmid = 16402880 | hdl = 10057/114 | hdl-access = free }}

When siblings reach adulthood, it is more likely that they will no longer live in the same place and that they will become involved in jobs, hobbies, and romantic interests that they do not share and therefore cannot use to relate to one another. In this stage the common struggles of school and being under the strict jurisdiction of parents is dissolved. Despite these factors, siblings often maintain a relationship through adulthood and even old age..Cicirelli, V. G. (1981). "Helping elderly parents: Role of adult children." Boston: Auburn House. Proximity is a large factor in maintaining contact between siblings; those who live closer to one another are more likely to visit each other frequently. In addition, gender also plays a significant role.White, L. K., & Riedmann, A. (1992). Ties among adult siblings. "Social Forces, 71", 85–102. Sisters are most likely to maintain contact with one another, followed by mixed-gender dyads. Brothers are least likely to contact one another frequently.

Communication is especially important when siblings do not live near one another. Communication may take place in person, over the phone, by mail, and with increasing frequency, by means of online communication such as email and social networking. Often, siblings will communicate indirectly through a parent, a mutual friend or a relative.Adams, B. N. (1968) "Kinship in an urban setting." Chicago: Markham. Between adult and elderly siblings, conversations tend to focus on family happenings and reflections of the past.Cicirelli, V. G. (1985). The role of siblings as family caregivers. In W. J. Sauer & R. T. Coward (Eds.), "Social support networks and the care of the elderly" (pp. 93–107). New York: Springer-Verlag.

In adulthood, siblings still perform a role similar to that of friends. Friends and siblings are often similar in age, with any age gap seeming even less significant in adulthood. Furthermore, both relationships are often egalitarian in nature, although unlike sibling relationships, friendships are voluntary. The specific roles of each relationship also differ, especially later in life. For elderly siblings, friends tend to act as companions while siblings play the roles of confidants.Connidis, I. A., & Davies, L. (1990) Confidants and companions in later life: The place of family and friends. "Journal of Gerontology: Social Sciences, 45", 141–149

It is difficult to make long-term assumptions about adult sibling relationships, as they may rapidly change in response to individual or shared life events.Connidis, I. A. (1992). Life transitions and the adult sibling tie: A qualitative study. "Journal of Marriage and the Family, 54", 972–982.Bedford, V. H. (1990). Changing affect toward siblings and the transition to old age. "Proceedings of the Second International Conference on the Future of Adult Life". Leeuwenhorst, The Netherlands. Marriage of one sibling may either strengthen or weaken the sibling bond. The same can be said for change of location, birth of a child, and numerous other life events. However, divorce or widowhood of one sibling or death of a close family member most often results in increased closeness and support between siblings.

Sibling relationships are important within the family system. Family systems theory (Kerr and Bowen, 1988) is a theory of human behavior that defines the family unit as a complex social system, in which members interact to influence each other's behavior{{Cite web |title=Family Systems Theory - an overview {{!}} ScienceDirect Topics |url=https://www.sciencedirect.com/topics/medicine-and-dentistry/family-systems-theory#:~:text=Family |access-date=2022-06-21 |website=www.sciencedirect.com}} These relationships have an effect on child development, behavior, and support throughout their life span. A child's development is influenced by the dynamic system as a result of the family system. The relationship between siblings is the most important, but isn't focused on as much as other family relationships. Within the family system, not all roles amongst siblings are the same or shared.{{Cite journal |last=Cox |first=Martha J. |date=2010-07-15 |title=Family Systems and Sibling Relationships |url=https://doi.org/10.1111/j.1750-8606.2010.00124.x |journal=Child Development Perspectives |volume=4 |issue=2 |pages=95–96 |doi=10.1111/j.1750-8606.2010.00124.x |issn=1750-8592}} An older sibling can be placed in a position to fulfill the shoes of a parental role. This makes the older sibling a role model and caretaker to the younger sibling. A positive impact on the younger siblings' development may occur.{{Cite journal |last1=Furman |first1=Wyndol |last2=Buhrmester |first2=Duane |date=1985 |title=Children's Perceptions of the Qualities of Sibling Relationships |url=https://www.jstor.org/stable/1129733 |journal=Child Development |volume=56 |issue=2 |pages=448–461 |doi=10.2307/1129733 |jstor=1129733 |pmid=3987418 |issn=0009-3920}}

{{Main|Sibling rivalry}}

Sibling rivalry describes the competitive relationship or animosity between siblings, blood-related or not. Often competition is the result of a desire for greater attention from parents. However, even the most conscientious parents can expect to see sibling rivalry in play to a degree. Children tend to naturally compete with each other for not only attention from parents but for recognition in the world.

Siblings generally spend more time together during childhood than they do with parents. The sibling bond is often complicated and is influenced by factors such as parental treatment, birth order, personality, and people and experiences outside the family.[http://www.psychologytoday.com/articles/pto-19930101-000023.html Adult Sibling Rivalry] {{webarchive|url=https://archive.today/20121211220721/http://www.psychologytoday.com/articles/pto-19930101-000023.html |date=2012-12-11 }} Jane Mersky Leder, Psychology Today, Publication Date: Jan/Feb 93, Last Reviewed: 30 Aug 2004 According to child psychologist Sylvia Rimm, sibling rivalry is particularly intense when children are very close in age and of the same gender, or where one child is intellectually gifted.[http://www.sylviarimm.com/article13.html The Effects of Sibling Competition] {{webarchive|url=https://web.archive.org/web/20070701155521/http://www.sylviarimm.com/article13.html |date=2007-07-01 }} Syliva B. Rimm, Educational Assessment Service, 2002. Sibling rivalry involves aggression and insults, especially between siblings close in age.

Siblings may be jealous of and harbor resentment toward one another. The main causes of sibling rivalry are lack of social skills, concerns with fairness, individual temperaments, special needs, parenting style, parent's conflict resolution skills and culture.{{Cite web |title=what are the main causes of sibling rivalry |url=https://www.medicinenet.com/article.htm |website=medicinenet.com}} In many families, the children count their siblings among their friends. But it's also common for siblings to be great friends on one day and hateful to one another on the next.

There are many things that can influence and shape sibling rivalry. According to Kyla Boyse from the University of Michigan, each child in a family competes to define who they are as individuals and want to show that they are separate from their siblings. Children may feel they are getting unequal amounts of their parents' attention, discipline, and responsiveness. Children fight more in families where there is no understanding that fighting is not an acceptable way to resolve conflicts, and no alternative ways of handling such conflicts. Stress in the parents' and children's lives can create more conflict and increase sibling rivalry.

Sigmund Freud saw the sibling relationship as an extension of the Oedipus complex, where brothers were in competition for their mother's attention and sisters for their father's.[http://www.freud-museum.at/e/inhalt/wissenJulietMitchell2003.html Freud Lecture: Juliet Mitchell, 2003] For example, in the case of Little Hans, Freud postulated that the young boy's fear of horses was related to jealousy of his baby sister, as well as the boy's desire to replace his father as his mother's mate. This view has been largely discredited by modern research.

Formulated by Robert Trivers, parent-offspring theory is important for understanding sibling dynamics and parental decision-making. Because parents are expected to invest whatever is necessary to ensure the survival of their offspring, it is generally thought that parents will allocate the maximum amount of resources available, possibly to their own detriment and that of other potential offspring.{{cite journal | last1 = Trivers | first1 = R.L. | year = 1974 | title = Parent-offspring conflict | journal = American Zoologist | volume = 14 | pages = 249–264 | doi = 10.1093/icb/14.1.249 | doi-access = free }} While parents are investing as much as possible to their offspring, offspring may at the same time attempt to obtain more resources than the parents are able to give to maximize its own reproductive success. Therefore, there is a conflict between the wants of the individual offspring and what the parent is able or willing to give. An extension of Trivers' theory leads to predict that it will pay siblings to compete intensely with one another. It can pay to be selfish even to the detriment of not only one's parents but also to one's siblings, as long as the total fitness benefits of doing do outweigh the total costs.Salmon, C., & Shackelford, T. K. (n.d.). The Oxford Handbook of Evolutionary Family Psychology, 57–132

{{See also|Deidentification (psychology)}}

Alfred Adler saw siblings as "striving for significance" within the family and felt that birth order was an important aspect of personality development. The feeling of being replaced or supplanted is often the cause of jealousy on the part of the older sibling.Ellis-Christensen, T. (2003). What is Sibling Rivalry?. In wiseGEEK clear answers for common question In fact, psychologists and researchers today endorse the influence of birth order, as well as age and gender constellations, on sibling relationships. A child's personality can also have an effect on how much sibling rivalry will occur in a home. Some kids seem to naturally accept changes, while others may be naturally competitive, and exhibit this nature long before a sibling enters the home. However, parents are seen as capable of having an important influence on whether they are competitive or not.[http://psychclassics.yorku.ca/FrustAgg/levy.htm The Hostile Act] David M. Levy (1941) First published in Psychological Review, 48, 356–361.

David Levy introduced the term "sibling rivalry" in 1941, claiming that for an older sibling "the aggressive response to the new baby is so typical that it is safe to say it is a common feature of family life."[http://www.vision.org/visionmedia/laurie-kramer-interview/sibling-relationships/44340.aspx Interview with Laurie Kramer] G. Stepp (2011). Researchers today generally endorse this view, noting that parents can ameliorate this response by being vigilant to favoritism and by taking appropriate preventative steps.[https://onbabyworld.com/parenting/step-sibling-rivalry/ sibling] (2011). In fact, say researchers, the ideal time to lay the groundwork for a lifetime of supportive relationships between siblings is during the months prior to the new baby's arrival.[http://www.med.umich.edu/yourchild/topics/newbaby.htm Helping Your Older Child Adjust to a New Baby Sibling] University of Michigan Health System (2011).

According to observational studies by Judy Dunn, children as early as one may be able to exhibit self-awareness and perceive difference in parental treatment between themselves and a sibling and early impressions can shape a lifetime relationship with the younger sibling. From 18 months on siblings can understand family rules and know how to comfort and be kind to each other. By 3 years old, children have a sophisticated grasp of social rules, can evaluate themselves in relation to their siblings, and know how to adapt to circumstances within the family. Whether they have the drive to adapt, to get along with a sibling whose goals and interests may be different from their own, can make the difference between a cooperative relationship and a rivalrous one.

Studies have further shown that the greatest sibling rivalry tends to be shown between brothers, and the least between sisters. Naturally, there are exceptions to this rule. What makes brother/brother ties so rivalrous? Deborah Gold has launched a new study that is not yet completed. But she has found a consistent theme running through the interviews she's conducted thus far. "The thing that rides through with brothers that doesn't come across in other sibling pairs is this notion of parental and societal comparison. Somehow with boys, it seems far more natural to compare them, especially more than with sister/brother pairs. Almost from day one, the fundamental developmental markers—who gets a tooth first, who crawls, walks, speaks first—are held up on a larger-than-life scale. And this comparison appears to continue from school to college to the workplace. Who has the biggest house, who makes the most money, drives the best car are constant topics of discussion. In our society, men are supposed to be achievement-oriented, aggressive. They're supposed to succeed."

Sibling rivalry often continues throughout childhood and can be very frustrating and stressful to parents.[http://www.med.umich.edu/yourchild/topics/sibriv.htm Sibling Rivalry] University of Michigan Health System, June 2009 Adolescents fight for the same reasons younger children fight, but they are better equipped physically and intellectually to hurt and be hurt by each other. Physical and emotional changes cause pressures in the teenage years, as do changing relationships with parents and friends. Fighting with siblings as a way to get parental attention may increase in adolescence.[http://www.ext.nodak.edu/extnews/pipeline/teen-6w.htm Living With Your Teenager: Dealing With Sibling Rivalry] {{webarchive|url=https://web.archive.org/web/20110725054814/http://www.ext.nodak.edu/extnews/pipeline/teen-6w.htm |date=2011-07-25 }} Donna Rae Jacobson, North Dakota State University, July 1995 One study found that the age group 10 to 15 reported the highest level of competition between siblings.[http://jrscience.wcp.muohio.edu/humannature01/FinalArticles/SiblingRivalryinDegreeand.html Sibling Rivalry in Degree and Dimensions Across the Lifespan] {{Webarchive|url=https://web.archive.org/web/20171015222353/http://jrscience.wcp.muohio.edu/humannature01/FinalArticles/SiblingRivalryinDegreeand.html |date=2017-10-15 }} Annie McNerney and Joy Usner, 30 April 2001.

However, the degree of sibling rivalry and conflict is not constant. Longitudinal studies looking at the degree of sibling rivalry throughout childhood from Western societies suggest that, over time, sibling relationships become more egalitarian and this suggest less conflict.Buhrmester, D., & Furman, W. (1987). The development of companionship and intimacy. ChildDevelopment, 58, 1101- 1113 Yet, this effect is moderated by birth order: Older siblings report more or less the same level of conflict and rivalry throughout their childhood. In contrast, young siblings report a peak in conflict and rivalry around young adolescence and a drop in late adolescence. The decline in late adolescence makes sense from an evolutionary perspective: Once resources cease and/ or individuals have started their own reproductive career, it makes little sense for sibling to continue fierce competition over resources that do not affect their reproductive success anymore.Pollet, TV, & Nettle, D. (2007). Birth order and face-to-face contact with a sibling: Firstborns have more contact than laterborns. Personality and individual Differences, 43, 1796–1806

Sibling rivalry can continue into adulthood and sibling relationships can change dramatically over the years. Events such as a parent's illness may bring siblings closer together, whereas marriage may drive them apart, particularly if the in-law relationship is strained. Approximately one-third of adults describe their relationship with siblings as rivalrous or distant. However, rivalry often lessens over time. At least 80 percent of siblings over age 60 enjoy close ties.

Parents can reduce the opportunity for rivalry by refusing to compare or typecast their children,[http://www.vision.org/visionmedia/parenting-issues/family-favoritism/43568.aspx Parenting Issues: Playing Favorites] Stepp, G. (2011) teaching the children positive ways to get attention from each other and from the parent, planning fun family activities together, and making sure each child has enough time and space of their own. They can also give each child individual attention, encourage teamwork, refuse to hold up one child as a role model for the others, and avoid favoritism.[http://www.parenting-ed.org Center for Effective Parenting] Arkansas State Parent Information & Resource Center It is also important for parents to invest in time spent together as a whole family. Children who have a strong sense of being part of a family are likely to see siblings as an extension of themselves. However, according to Sylvia Rimm, although sibling rivalry can be reduced it is unlikely to be eliminated. In moderate doses, rivalry may be a healthy indication that each child is assertive enough to express his or her differences with other siblings.

WeiheWiehe, V. R. (1997) Sibling abuse: Hidden physical, emotional, and sexual trauma, 2nd edition. Thousand Oaks, CA: Sage Publications, Inc. suggests that four criteria should be used to determine if questionable behavior is rivalry or sibling abuse. First, one must determine if the questionable behavior is age appropriate: e.g., children use different conflict-resolution tactics during various developmental stages. Second, one must determine if the behavior is an isolated incident or part of an enduring pattern: abuse is, by definition, a long-term pattern rather than occasional disagreements. Third, one must determine if there is an "aspect of victimization" to the behavior: rivalry tends to be incident-specific, reciprocal and obvious to others, while abuse is characterized by secrecy and an imbalance of power. Fourth, one must determine the goal of the questionable behavior: the goal of abuse tends to be embarrassment or domination of the victim.

Parents should remember that sibling rivalry today may someday result in siblings being cut off from each other when the parents are gone. Continuing to encourage family togetherness, treating siblings equitably, and using family counseling to help arrest sibling rivalry that is excessive may ultimately serve children in their adult years.

{{anchor|incest}}

{{See also|Adelphogamy|List of coupled siblings}}

File:Amnon and Tamar by an unknown artist, oil on canvas, ca. 1650-1700, High Museum of Art.jpg and Tamar, children of the biblical King David, were half-siblings yet Amnon raped Tamar{{bibleverse|2 Samuel|13:15–22}} (unknown European artist, oil on canvas, {{circa}} 1650–1700, High Museum of Art)]]

While cousin marriage is legal in most countries, and avunculate marriage is legal in many, sexual relations between siblings are considered incestuous almost universally{{cn|date=April 2024}}. Innate sexual aversion between siblings forms due to close association in childhood, in what is known as the Westermarck effect. Children who grow up together do not normally develop sexual attraction, even if they are unrelated, and conversely, siblings who were separated at a young age may develop sexual attraction.{{cn|date=March 2025}}

Thus, many cases of sibling incest, including accidental incest, concern siblings who were separated at birth or at a very young age.[http://news.bbc.co.uk/2/hi/6424337.stm Incest: an age-old taboo], BBC News, 12 March 2007 One study from New England has shown that roughly 10% of males and 15% of females had experienced some form of sexual contact with a brother or sister, with the most common form being fondling or touching of one another's genitalia.{{cite journal|last1=Finkelhor|first1=David|title=Sex among siblings: A survey on prevalence, variety, and effects|journal=Archives of Sexual Behavior|volume=9|issue=3|date=1980|pages=171–194|doi=10.1007/BF01542244|pmid=7396691|s2cid=7206053}}

{{anchor|marriage}}

File:Jean V Comte dArmagnac.jpg married his sister Isabelle {{circa}} 1450 and fought hard to keep the marriage but failed in the end.]]

John M. Goggin and William C. Sturtevant (1964) listed eight societies which generally allowed sibling marriage, and thirty-four societies where sibling marriage was permissible among certain classes only.{{Cite journal |last1=Piault |first1=C. |last2=Goodenough |first2=Ward H. |date=1966 |title=Explorations in Cultural Anthropology. Essays in Honor of George Peter Murdock |url=http://dx.doi.org/10.2307/3319280 |journal=Revue Française de Sociologie |pages=204 |doi=10.2307/3319280 |jstor=3319280 |issn=0035-2969}}

A historical marriage that took place between full siblings was that between John V, Count of Armagnac and Isabelle d'Armagnac, dame des Quatre-Vallées, c. 1450. The provided papal dispensation for this union was declared forged in 1457.Traditio 23. Canonical Implications of Richard III's Plan to Marry His Niece. Kelly, H.A. 1967 pp. 269–311. Les Cahiers de Saint Louis. Dupont, Jacques and Saillot, Jacques. 1987. Angers et Nantes, p. 755. (In French). Europäische Stammtafeln, Neue Folge. Armagnac, Cte d' (Lomagne). Schwennicke, Detlev, editor. Volume III, Section 3, Table 571. (In German) The marriage was declared invalid and the children were declared bastards and removed from the line of succession.

In antiquity, Laodice IV, a Seleucid princess, priestess, and queen, married all three of her brothers in turn.

Sibling marriage was especially frequent in Roman Egypt, and probably even the preferred norm among the nobility.

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• {{cite journal | last = Hopkins | first = Keith |author-link=Keith Hopkins | year = 1980 | title = Brother-Sister Marriage in Roman Egypt | journal = Comparative Studies in Society and History | volume = 22 | pages=303–54 | doi = 10.1017/S0010417500009385 | issue = 3| s2cid = 143698328 }}
• {{cite web | last = Remijsen | first = Sofie | title = Incest or Adoption? Brother-Sister Marriage in Roman Egypt Revisited | url = https://lirias.kuleuven.be/bitstream/123456789/208733/2/Journal+of+Roman+Studies+2008+Remijsen.pdf}}
• {{cite journal | last = Scheidel | first = W | title = Brother-sister marriage in Roman Egypt | journal = Journal of Biosocial Science | year = 1997 | volume = 29 | issue = 3 | pages = 361–71 | doi = 10.1017/s0021932097003611 | pmid = 9881142 | s2cid = 23732024 | url = http://humweb.ucsc.edu/jklynn/AncientWomen/ScheidelBrotherSisterMarriages.pdf}} In most cases, marriage of siblings in Roman Egypt was a result of the religious belief in divinity and maintaining purity. Based on the model from the myth of Osiris and Isis, it was considered necessary for a god to marry a goddess and vice versa. This led to Osiris marrying his sister Isis due to limited options of gods and goddesses to marry. In order to preserve the divinity of ruling families, siblings of the royal families would marry each other.Maynes, Mary Jo., and Ann Beth. Waltner. The Family: A World History. Oxford: Oxford UP, 2012. Print.

Sibling marriage is also common among the Zande people of Central Africa.{{citation needed|date=August 2022}}

In a number of European countries such as Belgium, France, Luxembourg, the Netherlands and Spain, marriage between siblings remains prohibited, but incest between siblings is no longer prosecuted.{{cite web |url=http://www.focus.de/panorama/welt/tid-22414/europaeischer-gerichtshof-geschwisterpaar-bringt-inzest-verbot-ins-wanken_aid_629510.html | title=Geschwisterpaar bringt Inzest-Verbot ins Wanken | date=22 May 2011 | language=de}}

According to {{harvtxt|Cavanagh Johnson|Friend|1995}}, between forty and seventy-five percent of children will engage in some sort of sexual behavior before reaching 13 years of age.{{Cite book|last1=Cavanagh Johnson|first1=Toni|url=https://eric.ed.gov/?id=ED386884|title=True and False Allegations of Child Sexual Abuse: Assessment and Case Management|last2=Friend|first2=Colleen|date=1995|publisher=Brunner/Mazel Inc|isbn=978-0-87630-758-8|editor-last=Ney|editor-first=Tara|language=en|chapter=Assessing Young Children's Sexual Behaviors in the Context of Child Sexual Abuse Evaluations}} In these situations, children are exploring each other's bodies while also exploring gender roles and behaviors, and their sexual experimentation does not indicate that these children are child sex offenders. As siblings are generally close in age and locational proximity, the opportunity for sexual exploration between siblings is fairly high and that, if simply based on mutual curiosity, then these activities are not harmful or distressing, either in childhood or later in adulthood.{{harvp|Borgis|2002}}{{Full citation needed|date=December 2021}} According to {{harvtxt|Reinisch|1990}}, studying early sexual behavior generally, over half of all six- and seven-year-old boys have engaged in sex play with other boys, and more than a third of them with girls, while more than a third of six- and seven-year-old girls have engaged in such play with both other girls and with boys.{{Harvp|Reinisch|1990}} This play includes playing doctor, mutual touching, and attempts at simulated, non-penetrative intercourse. Reinisch views such play as part of a normal progression from the sensual elements of bonding with parents, to masturbation, and then to sex play with others. By the age of eight or nine, according to Reinisch, children become aware that sexual arousal is a specific type of erotic sensation, and will seek these pleasurable experiences through various sights, self-touches, and fantasy, so that earlier generalized sex play shifts into more deliberate and intentional arousal.

Abusive incestuous relationships between siblings can have adverse effects on the parties involved. Such abuse can leave victims detrimentally hindered in developmental processes, such as those necessary for interpersonal relations, and can be the cause for depression, anxiety, and substance abuse in the victim's adult life.{{Cite journal|url=http://www.familiesinsociety.org/articlearchive/2011/92-1_carlson.pdf|last=Carlson|first=Bonnie E.|year=2011|title=Sibling Incest: Adjustment in Adult Women Survivors|journal=Families in Society|volume=92|issue=1|pages=77–83|doi=10.1606/1044-3894.4067|s2cid=143044253}}{{dead link|date=May 2018|bot=InternetArchiveBot|fix-attempted=yes}} Definitions used have varied widely. Child sexual abuse between siblings is defined by the (US) National Task Force on Juvenile Sexual Offending as: sexual acts initiated by one sibling toward another without the other's consent, by use of force or coercion, or where there is a power differential between the siblings. In {{harvtxt|Caffaro|Conn-Caffaro|1998}}, sibling child sexual abuse is defined as "sexual behavior between siblings that is not age appropriate, not transitory, and not motivated by developmentally, mutually appropriate curiosity".{{Harvp|Caffaro|Conn-Caffaro|1998}} When child sexual experimentation is carried out with siblings, some researchers, e.g. {{harvtxt|Bank|Kahn|1982}},{{Harvp|Bank|Kahn|1982}} do consider it incest, but those researchers who do use that term distinguish between abusive incest and non-abusive incest. Bank and Kahn say that abusive incest is power-oriented, sadistic, exploitative, and coercive, often including deliberate physical or mental abuse.{{Harvp|Bank|Kahn|1982}}

Views of young sibling sexual contact may be affected by more general views regarding sexuality and minors:

{{harvtxt|Finkelhor|Hotaling|1984}}{{cite book|last1=Finkelhor|first1=David|url=https://books.google.com/books?id=bHdHAAAAMAAJ|title=Child Sexual Abuse: New Theory and Research|last2=Yllö|first2=Kersti|publisher=Free Press|year=1984|isbn=978-0029100202|location=New York|author-link=David Finkelhor}} consider sexual contact to be abusive only under these circumstances:{{Cite journal|last1=Finkelhor|first1=David|author-link=David Finkelhor|last2=Hotaling|first2=Gerald T.|date=1984-01-01|title=Sexual abuse in the national incidence study of child abuse and neglect: An appraisal|url=https://dx.doi.org/10.1016/0145-2134%2884%2990046-2|journal=Child Abuse & Neglect|language=en|volume=8|issue=1|pages=23–32|doi=10.1016/0145-2134(84)90046-2|pmid=6609754|issn=0145-2134}}

1. it occurs with a child less than 13 years old, and the perpetrator is more than five years older than the victim or if the child is between 13 and 16 years old, and the perpetrator is ten years older than the victim;
2. coercion, force, or threat is used.

{{harvtxt|Laviola|1992}} says that behavior that is sexually abusive of children (generally speaking) depends upon the use of power, authority, bribery, or appeal to the child's trust or affection.{{cite journal|last1=Laviola|first1=Marisa|title=Effects of older brother-younger sister incest: A study of the dynamics of 17 cases|journal=Child Abuse & Neglect|volume=16|issue=3|year=1992|pages=409–421|issn=0145-2134

|doi=10.1016/0145-2134(92)90050-2|pmid=1617475}}

{{harvtxt|De Jong|1989}} offers four criteria to judge whether sexual behavior involving persons under 14 years old is abusive or not:

1. an age difference of more than five years;
2. use of force, threat, or authority;
3. attempted penile penetration;
4. physical injury to the victim.

According to De Jong, if one or more of these is present, the behavior is abusive, whereas if none is present, the behavior must be considered normal sexual experimentation.{{cite journal|last=De Jong|first=Allan R.|title=Sexual interactions among siblings and cousins: Experimentation or exploitation?|journal=Child Abuse & Neglect|volume=13|issue=2|year=1989|pages=271–279|issn=0145-2134|doi=10.1016/0145-2134(89)90014-8|pmid=2743184}}

• Siblings Day
• Sibling estrangement

{{Reflist}}

{{Refbegin}}

• {{Cite book|last1=Bank|first1=Stephen P.|url=https://books.google.com/books?id=RaM0NXVcAzAC|title=Sibling Bond|last2=Kahn|first2=Michael D.|date=1982-06-10|publisher=Basic Books|isbn=978-0-465-07818-9|language=en}}
• {{Citation|last1=Caffaro|first1=J.|title=Sibling Abuse Trauma Assessment and Intervention Strategies for Children, Families, and Adults.|year=1998|last2=Conn-Caffaro|first2=A.|mode=cs1}}
• {{Cite book|last=Reinisch|first=June Machover|url=https://www.worldcat.org/oclc/22117510|title=The Kinsey Institute new report on sex: What you must know to be sexually literate|date=1990|others=Ruth Beasley|publisher=St. Martin's Press|isbn=978-0-312-05268-3|location=New York|language=English|oclc=22117510}}

{{Refend}}

• Santrock, J.W. (2007). A Topical Approach to Life-Span Development. New York, NY: McGraw-Hill Companies, Inc.

• {{Cite book|url=https://www.worldcat.org/oclc/20491210|title=Adolescence and puberty|date=1990|publisher=Oxford University Press|editor1=John Bancroft|editor2=June Machover Reinisch|isbn=1-4237-2913-7|location=New York|oclc=61880843}}

{{Family}}

{{DEFAULTSORT:Sibling Relationship}}

Category:Interpersonal relationships

Category:Kinship and descent

Category:Traditions involving siblings