Attachment theory is a psychological theory that aims to explain how the emotional bond between infants or children and their caregivers develops, and how this bond affects later relationships, emotion regulation and the way a person perceives themselves. The foundations of the theory were laid in the mid-20th century by the British psychiatrist and psychoanalyst John Bowlby.
What is attachment theory?
According to attachment theory, people are born with a tendency to seek closeness to a caregiver who protects and comforts them in the first years of life. This tendency is viewed as a behavioral system that serves survival: when a child is frightened, tired or distressed, the child tries to approach the caregiver, call out or cling. When a caregiver responds to these needs consistently and sensitively, this contributes to the development of the child’s sense of trust.
Who was John Bowlby?
John Bowlby (1907–1990) was a British physician who worked in child psychiatry and psychoanalysis. Working at the Tavistock Clinic in London, Bowlby developed attachment theory after studies on the effects of separation, loss and institutional care on children’s development. The theory is set out in detail in the three-volume work Attachment and Loss. Bowlby (1988) argued that a person’s vulnerability to stress is shaped largely by the development and current state of close relationships.
What are the key concepts of attachment theory?
- Attachment behavioral system: The system that regulates a child’s search for closeness to a caregiver in the face of danger, fear or fatigue.
- Safe haven and exploration base: A frightened child uses the caregiver as a “safe haven” for comfort and, while exploring the environment, relies on the caregiver as a base for exploration (TUBITAK Encyclopedia).
- Internal working models: Mental representations formed from early relationship experiences that shape a person’s expectations of the self and of others. They can guide later relationships but are not closed to change.
- Separation anxiety: The distress a child feels when separated from the person the child is attached to; it is regarded as an indicator of attachment.
How is attachment observed and measured?
The best-known method for observing attachment is the Strange Situation, developed by Mary Ainsworth and colleagues: infants aged about 12 to 20 months are observed during brief separations from, and reunions with, a caregiver. Ainsworth and colleagues (1978) described three basic patterns (a securely attached pattern, an avoidant pattern and an ambivalent/resistant pattern); the disorganized category was added later by Main and Solomon (Granqvist et al., 2017). In adults, attachment is most often described along the dimensions of anxiety and avoidance (TUBITAK Encyclopedia). For details of the Strange Situation and the names of attachment styles, see What Are Attachment Styles?.
What does attachment theory say about adulthood?
Bowlby argued that attachment is not limited to childhood and remains important throughout life. Later researchers extended the concept to adult relationships; for example, Hazan and Shaver (1987) approached romantic relationships as an attachment process. The patterns adults show in the face of closeness, trust and separation are not fixed labels or diagnoses attached to a person; they are tendencies that can change with relationships and life experiences. The link between attachment experiences and the way a person copes with feelings is also frequently discussed; see What Is Emotion Regulation? for more on this topic.
What are common misconceptions about attachment theory, and what are its limits?
- “Early experiences determine adulthood once and for all.” No. In a 20-year follow-up of 50 participants, about 72% of infants received the same classification regarding attachment security in early adulthood; change was more common among those who reported negative life events (Waters et al., 2000).
- “Attachment classifications are diagnoses, and attachment insecurity is a disorder.” No. Strange Situation classifications are used for observation and research, and attachment insecurity on its own is generally not treated as a mental disorder. In particular, disorganized attachment is described as not a validated clinical diagnosis at the individual level and as distinct from “attachment disorders” (Granqvist et al., 2017).
- “A caregiver’s behavior alone determines attachment.” No. A meta-analysis found a moderate association between caregiver sensitivity and attachment security (r = .24 across 21 Strange Situation studies) and described sensitivity as important but not the only condition (De Wolff and van IJzendoorn, 1997).
How is attachment theory used in psychotherapy?
Attachment theory can be used in different psychotherapy approaches as a framework that helps in understanding a person’s relationship patterns and feelings. Difficulties in close relationships, experiences of trust, closeness and separation, and their links to the past can be addressed together in psychotherapy (for general information, see What Is Psychotherapy?). For more information, see Interpersonal Relationship Difficulties and How They Are Addressed in Psychotherapy and What Is Psychodynamic Psychotherapy?.
Expert note
Attachment theory makes it possible to approach a person’s patterns in close relationships not as “destiny” but as tendencies that can be understood within a life story. From a perspective that draws on cognitive behavioral and psychodynamic psychotherapy theories, present relationship difficulties are understood by considering current cycles of thoughts and behaviors together with past relationship experiences.
The language of attachment theory offers a framework not for labeling oneself or loved ones, but for examining recurring patterns in relationships with curiosity and understanding. The information in this article does not replace an individual assessment.
Clinical Psychologist Özgün Emre Yaylacı
Frequently asked questions
Who developed attachment theory?
The foundations of the theory were laid by John Bowlby. Mary Ainsworth’s “Strange Situation” observation method and related work on attachment patterns enriched the theory empirically.
Is attachment theory only about infancy?
No. Although the theory began with infancy and childhood, later studies have applied the concept of attachment to close relationships in adolescence and adulthood as well.
Do early attachment experiences determine a person’s future?
Early experiences can shape a person’s expectations about relationships, but this is not destiny. Later relationships and life events can change these expectations; a 20-year follow-up study reported that the classification stayed the same in about 72% of cases and changed in the rest (Waters et al., 2000).
Is attachment theory a diagnostic method?
No. Attachment theory is a theoretical framework for understanding relationships and development; it is not used on its own to diagnose a mental disorder. The disorganized attachment classification is likewise not a validated clinical diagnosis at the individual level (Granqvist et al., 2017).
Are attachment theory and attachment styles the same thing?
No. Attachment theory is the general framework that explains the development and function of the bond; attachment styles are the individual patterns observed and classified within that framework (for example, Ainsworth’s Strange Situation classification). The names and classification schemes of the styles can vary by source.
Sources
This article was prepared for general information; the sources below were consulted in preparing it (the Turkish-language source is marked; the others are in English):
- Bowlby (1988): Developmental psychiatry comes of age. American Journal of Psychiatry, 145(1), 1–10
- Ainsworth, Blehar, Waters, and Wall (1978): Patterns of Attachment: A Psychological Study of the Strange Situation. Erlbaum (Psychology Press, 2015 edition)
- Hazan and Shaver (1987): Romantic love conceptualized as an attachment process. Journal of Personality and Social Psychology, 52(3), 511–524
- Granqvist et al. (2017): Disorganized attachment in infancy: A review of the phenomenon and its implications for clinicians and policy-makers. Attachment & Human Development, 19(6), 534–558
- Waters et al. (2000): Attachment security in infancy and early adulthood: A twenty-year longitudinal study. Child Development, 71(3), 684–689
- De Wolff and van IJzendoorn (1997): Sensitivity and attachment: A meta-analysis on parental antecedents of infant attachment. Child Development, 68(4), 571–591
- TUBITAK Encyclopedia (Nebi Sümer): Attachment Theory (in Turkish)
This article was prepared by Clinical Psychologist Özgün Emre Yaylacı. Last updated: October 23, 2026. The content is for general information only and does not constitute diagnosis, treatment or personal guidance.
