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    Triangulation (family systems)

    家庭三角关系

    Concept
    Also called
    Triangulation, Triangles (Bowen theory), Triangling, Family triangulation

    What is triangulation in family systems theory?

    Triangulation, a concept from Bowen family systems theory, is how a strained two-person relationship draws in a third person, so tension shifts around three relationships: things steady, but nothing is resolved.[1] A common case is parents in conflict each pulling a child to their side.[2]

    In calm periods a triangle usually has two close insiders and one outsider. Here the mother pours her attention into the child, and the father, coming home later and later, ends up outside.Tension builds between mother and child, and the father sides with the mother, agreeing that the child is the problem. The conflict moves from mother and child to father and child.When father and child clash too hard, the mother defends the child, the conflict returns to the marriage, and the child moves outside to watch the parents fight. Under high tension, the outside is the most comfortable place.If the parents relate comfortably and each handles their own anxiety, the child is not drawn into their tensions. In Bowen theory, better-differentiated family members can stay close with little triangling.

    Lines

    • Close
    • Conflict
    • Distant
    • Ordinary contact

    Schematic, not an assessment tool. The line styles are this figure’s own, modeled on the close and conflict lines often used in genograms.

    Schematic, adapted from the fictional family the Bowen Center website uses to explain triangles. As tension rises, conflict among father, mother and child moves from one side of the triangle to another; the last step shows a better-differentiated family. Select a step. Select a part for details
    Schematic, adapted from the fictional family the Bowen Center website uses to explain triangles. As tension rises, conflict among father, mother and child moves from one side of the triangle to another; the last step shows a better-differentiated family. Select a step. Save as image (PNG)

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    Key points

    • Bowen theory treats the triangle as the basic unit of emotional systems: a pair tolerates little tension, three people can hold more, and any overflow spreads to interlocking triangles.[1]
    • Positions shift with tension: when calm, two insiders are close and one is outside; under high tension the outside spot is most comfortable, and an insider may set the other two fighting.[1]
    • In Bowen theory, better-differentiated families triangle less: when parents relate comfortably with each other, the child is not drawn into their tensions.[1]
    • A study following 416 two-parent families for three years found that the more a child was drawn into marital conflict, the more the child’s anxiety and low mood rose later.[3]

    An example

    Ms. Wang and her husband Jay have barely spoken for a week over a renovation. Ms. Wang keeps telling their daughter Lin, a middle schooler, to “go ask your dad,” and at dinner Jay complains to Lin about her mother. The couple seems calmer, but Lin now carries the messages, and nobody returns to the renovation itself.

    Misreadings and limits

    This is not the drama triangle: Bowen describes tension moving among three relationships, not fixed roles, and which side is in conflict reflects the whole triangle.[1] In research, triangulation means confirming a finding from several sources.[2] A 2004 review found little empirical support for Bowen’s specific theory of triangles.[4]

    Sources

    1. 1 Kerr, M. E. (n.d.). Triangles; Differentiation of self. The eight concepts of Bowen theory, The Bowen Center for the Study of the Family. View source
    2. 2 American Psychological Association (2018). Triangulation. APA Dictionary of Psychology (updated April 19, 2018). View source
    3. 3 Buehler, C., & Welsh, D. P. (2009). A process model of adolescents’ triangulation into parents’ marital conflict: The role of emotional reactivity. Journal of Family Psychology, 23(2), 167–180. doi:10.1037/a0014976
    4. 4 Miller, R. B., Anderson, S., & Keala, D. K. (2004). Is Bowen theory valid? A review of basic research. Journal of Marital and Family Therapy, 30(4), 453–466. doi:10.1111/j.1752-0606.2004.tb01255.x

    Last checked against sources: October 28, 2026