Attachment Theory In Psychology

Attachment theory explains how humans form strong emotional bonds with key individuals, starting in childhood, to help manage stress, fear, and uncertainty.

These bonds provide comfort and safety, shape how we see ourselves and others, and influence our relationships throughout life.

Attachment Theory

Attachment theory hypothesizes that early caregiver relationships establish social-emotional developmental foundations, but change remains possible across the lifespan due to interpersonal relationships during childhood, adolescence, and adulthood.

Attachment Behavioral System

The primary goal of the attachment system is “felt security,” which means feeling safe, understood, and supported by your caregivers. Felt security lets individuals confidently explore their surroundings and manage stress effectively, fostering growth and resilience.

The attachment behavioral system helps children manage their need for safety alongside their desire to explore and learn about the world.

This system becomes active when children encounter stress or discomfort, such as internal issues (like hunger, illness, tiredness) or external threats (unfamiliar situations, frightening stimuli, or perceived danger).

The greater the perceived stress or threat, the stronger the child’s instinct to seek closeness and reassurance from their caregivers.

How the System Works

This attachment system is most prominent during the first five years of life, a critical developmental period marked by significant dependency and vulnerability.

When activated, children engage in behaviors designed to gain closeness and comfort, including crying, calling, reaching, clinging, or actively seeking physical proximity.

Successful proximity seeking, reassurance, and comfort from caregivers help deactivate the attachment system, returning children to a calm and secure state.

Once reassured, children feel safe to shift their attention back to exploring and interacting with their environment confidently.

Bowlby (1988) suggests the attachment behavioral system remains important throughout life and will also motivate adults to seek emotional support from close relationships during times of stress.

Caregiving System

Caregivers provide a “safe haven,” responding to children’s distress signals by offering comfort, security, and reassurance.

The caregiving system is activated in response to children’s attachment behaviors or expressions of distress, prompting caregivers to provide immediate emotional and physical support.

Effective caregiving encompasses behaviors such as empathy, validation of emotions, physical closeness, soothing speech, affection, reassurance, and practical problem-solving assistance.

These caregiver responses help the child recover from distress. They restore a sense of emotional equilibrium.

Caregiving behavior also supports exploration by giving children the reassurance they need to engage confidently with their surroundings.

Sensitive caregiving involves accurately interpreting and responding promptly to the child’s signals, thus fostering secure attachment relationships and building a robust emotional foundation for children.

Beyond immediate emotional comfort, caregiving strategies include promoting trust, understanding and validating children’s thoughts and emotions, supporting self-esteem, and encouraging independent decision-making skills.

The Importance of Early Emotional Bonds

• Attachment behavior in adults toward the child includes responding sensitively and appropriately to the child’s needs.  Such behavior appears universal across cultures.
• Attachments are most likely to form with those who responded accurately to the baby’s signals, not the person they spent more time with. Schaffer and Emerson called this sensitive responsiveness.
• Reciprocity is the mutual, two-way interaction between an infant and caregiver, where both respond to each other’s signals, such as when a baby’s smile evokes a smile in return. This form of interactional synchrony is vital for a child’s development, establishing their foundational trust and shaping future relationships and learning.

Exploratory Behavioral System

When infants feel safe and secure, and their attachment system is deactivated, their energy can be devoted to what Bowlby (1969) refers to as the exploratory behavioral system. 

Exploration includes behaviors like approaching new objects, manipulating materials, experimenting with different outcomes, and interacting socially with others.

According to Bowlby (1969), the exploratory system is activated by novelty and is terminated when a person exhibits a sense of competence and familiarity with their environment.  

The Secure Base for Exploration

From this perspective, attachment figures can also be seen as a ‘secure base’ which infants use to explore their social world (Ainsworth, Blehar, Waters, & Wall, 1978).

The more assured the infant is in their attachment figure’s availability, the more likely they are to interact with others. This applies especially during times of stress.

Thus attachment, far from interfering with exploration, is viewed as nurturing exploration.

Caregivers who provide a secure base allow infants to become autonomous, inquisitive, and experimental.

Children who lack a secure base struggle to explore freely. Their attachment system keeps overriding attempts at autonomy and competent interaction with the social world.

This, in turn, can impair and harm a child’s social, emotional, and cognitive development (Bowlby, 1980).

Not all attachment figures become a secure base. This function depends on how responsive their caregiver is toward the infant (Ainsworth & Wittig, 1969).

Ainsworth et al. proposed the interconnecting between attachment and exploratory systems are adaptive as they ensure a balance between protection and exploration of the social and physical environment.

Creating a Secure Base for Children

The concept of a secure base is central to attachment theory.

It describes the role a primary caregiver plays in giving a child the confidence to explore the world, knowing that comfort and protection are always available if needed.

• A secure base gives children the confidence to venture out and explore their surroundings, knowing support is readily accessible.

• When a child feels safe, their urge to seek comfort (attachment system) reduces, allowing curiosity and exploration to flourish (exploratory system).

• This dynamic balance helps children move away to engage with intriguing objects or situations, while the presence of the caregiver prevents them from straying too far or too long.

Here’s a clear and detailed breakdown of how caregivers create and maintain a secure base:

1. Availability and Responsiveness

Being consistently available and responsive to a child’s needs forms the foundation for creating trust and a secure base.

This doesn’t require immediately addressing every emotional cue, but rather striking a balanced approach.

Prompt and sensitive responses to clear signs of distress or urgent needs are critical, while comfortably allowing less urgent signals to resolve naturally.

Trust is fundamentally built through numerous, often subtle, positive interactions accumulated over time.

Routine moments – such as feeding, play, and everyday exchanges – become powerful opportunities for reinforcing trust and emotional bonds.

Building Internal Working Models

When caregivers are reliably available and consistently responsive, children internalize this reliability, developing a secure sense of trust.

Consistent interactions contribute to forming internal working models, shaping children’s views of themselves as lovable and competent and caregivers as reliable and trustworthy.

However, when caregivers are frequently unavailable, absent, or inconsistently responsive, children may experience anxiety or fear in situations they perceive as threatening.

This inconsistency disrupts the child’s expectations about caregiver support, creating uncertainty and insecurity.

2. Interactional Synchrony

Synchrony means mothers and infants match behavior and emotion. They respond to each other in a well-timed, reciprocal way.

It’s like an interactive dance, where each partner intuitively moves in harmony.

Caregiver sensitivity, the ability to accurately perceive, interpret, and respond appropriately and promptly to signals, is a foundational quality that facilitates interactional synchrony.

When caregivers engage in synchrony, they are finely tuned to their child’s emotional signals, such as facial expressions, vocalizations, gestures, or cries. They respond sensitively and at the right moment.

Synchrony fosters feelings of safety, trust, and emotional closeness, reinforcing the child’s confidence that their caregiver is attentive and understanding.

Conversely, a lack of synchrony (asynchrony) -such as repeatedly misreading or poorly timing responses – can undermine security, potentially leading to anxiety or uncertainty about the caregiver’s availability.

Ainsworth’s Strange Situation

The Strange Situation Procedure was developed by psychologist Mary Ainsworth to measure attachment relationships between infants (12 to 18 months old) and their caregivers, typically mothers.

It involves observing an infant’s behavior in a controlled, unfamiliar environment through a structured sequence of  8 stages (episodes).

The procedure unfolds as follows:

1. The infant and caregiver enter a new playroom containing toys, and the infant is encouraged to explore.
2. Soon, a stranger enters and interacts gradually, first speaking with the caregiver, then approaching the infant.
3. Next, the caregiver quietly leaves, briefly leaving the infant alone with the stranger. Shortly afterward, the caregiver returns, offering comfort if needed, while the stranger exits.
4. This separation and reunion pattern is repeated, including leaving the infant briefly alone entirely and then again with the stranger.

Throughout these episodes, researchers observe key behaviors: how confidently the infant explores, their reactions to the caregiver leaving (separation anxiety), responses to the stranger (stranger anxiety), and behaviors upon reunion.

Based on these observations, infants are categorized into three main attachment styles.

• Secure: Comforted quickly upon caregiver’s return; confident exploration.
• Anxious-Ambivalent (Resistant): Highly distressed when caregiver leaves; seeks comfort but resists or rejects it upon reunion.
• Avoidant: Shows minimal distress during separation; often avoids or ignores caregiver upon reunion.

This procedure provides important insights into how early interactions and caregiver responsiveness influence emotional development, shaping children’s expectations of relationships throughout life.

Attachment Styles

Attachment styles refer to the particular way in which an individual relates to other people.

Attachment style forms at the very beginning of life. Once established, it stays with you, shaping how you relate in intimate relationships and how you parent your own children.

The concept rests on confidence in the attachment figure’s availability. That figure serves as a secure base for exploring the world when the child is not distressed, and a safe haven for support, protection, and comfort in times of distress.

Secure Attachment

Bowlby (1988) described secure attachment as the capacity to connect well and securely in relationships with others while also having the capacity for autonomous action as situationally appropriate.

Secure attachment is characterized by trust, an adaptive response to being abandoned, and the belief that one is worthy of love.

A securely attached infant seeks the mother out. This is especially clear during the reunion episode, when proximity and contact are actively maintained.

The infant may or may not be friendly with a stranger, but always shows more interest in the mother.

The infant also showed slight distress during separation. But unlike other patterns, the infant rarely cried and settled quickly.

Ainsworth and colleagues found securely attached infants showed less anxiety and more positive attitudes toward the relationship. They trusted their mothers to respond.

Anxious (Ambivalent) Attachment

Anxious attachment (also called ambivalent) relationships are characterized by a concern that others will not reciprocate one’s desire for intimacy.

This happens when an infant learns their caregiver is unreliable. The parent does not consistently provide responsive care for the infant’s needs.

An anxiously attached infant seems ambivalent and resistant. The infant often resists interactions with the mother, especially during the strange situation reunion episode.

However, once contact with the mother was gained, the infant also showed strong intentions to maintain such contact. Overall, these infants often showed maladaptive behavior.

Ainsworth and colleagues found ambivalent infants anxious and unconfident about their mothers’ responsiveness. Their mothers lacked “the fine sense of timing.”

As adults, those with an anxious preoccupied attachment style are overly concerned with the uncertainty of a relationship. They hold a negative working model of self and a positive working model of others.

Avoidant Attachment

Children with avoidant attachment styles tend to avoid interaction with the caregiver, and show no distress during separation.

This may be because the parent has ignored attempts to be intimate, and the child may internalize the belief that they cannot depend on this or any other relationship.

An infant with an avoidant attachment was characterized as displaying little to no tendency to seek proximity with the mother.

The infant often showed no distress at separation. They treated the stranger much like the mother. At reunion, the infant showed slight avoidance, such as turning away or avoiding eye contact.

Ainsworth and colleagues saw this avoidance as a defensive mechanism against the mother’s own rejecting behavior. Some mothers were uncomfortable with physical contact or grew angry with the infant more easily.

Disorganized (Fearful) Attachment

Main and Solomon (1986) discovered that a sizable proportion of infants did not fit into secure, anxious, or avoidant, based on their behaviors in the Strange Situation experiment.

They categorized these infants as having a disorganized attachment type.

Disorganized attachment is classified by children who display sequences of behaviors that lack readily observable goals or intentions, including obviously contradictory behaviors or stilling/freezing of movements.

Main and Solomon found that the parents of disorganized infants often had unresolved attachment-related traumas.

This led the parents to act frightened or frightening. As a result, the infants grew confused, or were forced to rely on someone they feared.

Stages of Attachment

Rudolph Schaffer and Peggy Emerson (1964) investigated whether attachment develops through a series of stages. They studied 60 babies at monthly intervals for the first 18 months of life. It became a classic longitudinal study.

The children were all studied in their own homes, and a regular pattern was identified in the development of attachment.

The babies were visited monthly for approximately one year, their interactions with their carers were observed, and carers were interviewed.

A diary was kept by the mother to examine the evidence for the development of attachment. Three measures were recorded:

• Stranger Anxiety – response to arrival of a stranger.

• Separation Anxiety – distress level when separated from carer, degree of comfort needed on return.

• Social Referencing – degree that child looks at carer to check how they should respond to something new (secure base).

They discovered that baby’s attachments develop in the following sequence:

The results of the study indicated that attachments were most likely to form with those who responded accurately to the baby’s signals, not the person they spent more time with. 

Schaffer and Emerson called this sensitive responsiveness.

Intensely attached infants had mothers who responded quickly to their demands and, interacted with their child. Infants who were weakly attached had mothers who failed to interact.

The Lasting Impact of Early Attachment

Bowlby’s theory (1988) holds that forming a primary attachment creates a mental representation of what a relationship is: an internal working model. This model shapes later friendships, work, and romantic relationships.

The different attachment styles may be viewed as internal working models of relationships that evolved from event experiences (Main, Kaplan, & Cassidy, 1985).

Early interactions with caregivers do not only shape how an infant behaves in relationships, as shown by infant attachment styles. That impact can also carry forward into adult attachment.

According to Bowlby (1969) later relationships are likely to be a continuation of early attachment styles (secure and insecure) because the behavior of the infant’s primary attachment figure promotes an internal working model of relationships which leads the infant to expect the same in later relationships.

Continuity Into Adulthood

There is continuity between early attachment experiences and later relationships. This is known as the continuity hypothesis.

Attachment does not end in infancy or childhood. It stays active throughout the lifespan (Bowlby, 1969).

Individuals continue to draw comfort from both physical and mental representations of significant others. An internal working model carries childhood attachment patterns forward into adolescence and adulthood.

Security still matters. Autonomy becomes more prominent too. Adults can tolerate higher levels of distress than children, so their attachment system activates less often.

New attachment bonds also form during adulthood. These become a significant source of support both during distress and during periods of goal achievement and exploration.

This internal working model usually can be updated as new relationships and experiences accumulate. That is why early attachment patterns predict, but do not fix, a person’s later relationships.

The Structure of Working Models

Researchers have proposed that working models are interconnected within a complex hierarchical structure (Bowlby, 1980; Bretherton, 1985, 1990; Collins & Read, 1994; Main, Kaplan, & Cassidy, 1985).

The highest-level model holds beliefs and expectations that apply across all relationships. Lower-level models hold general rules about specific relations, such as romantic or parental ties, underpinned by models specific to events within one particular relationship.

Multiple mental models genuinely coexist. Evidence shows considerable within-person variability in the expectations and beliefs people hold about themselves and others (Baldwin & Fehr, 1995).

Specific models of attachment relationships are positively associated with more general working models, but the correlations are only small to moderate (less than .40). This indicates that they comprise distinct beliefs about the self and significant others (Cozzarelli, Hoekstra, & Bylsma, 2000).

These generalized models differ from relationship-specific ones. General mental models likely reflect a typical appraisal of the self and others across relationships, while relationship-specific beliefs about a particular partner represent only part of that broader picture.

The Adult Attachment Interview

The Strange Situation measures attachment in infants, but psychologists also needed a way to assess attachment in adults. Mary Main and colleagues developed the Adult Attachment Interview (AAI) to fill this gap (Main, Kaplan, & Cassidy, 1985).

The AAI asks about childhood relationships with each parent. It is scored not on the facts reported, but on how coherently the story is told.

How the AAI Works

The AAI is a semi-structured interview of 15 questions. It lasts about 90 minutes. For each parent, the person chooses five adjectives that describe the relationship in childhood, then illustrates each choice with a specific memory.

Coders classify the whole transcript into one overall “state of mind” regarding attachment. What matters is whether the account is truthful, consistent, relevant, and clearly organized. The content matters less than the manner of telling it.

Two people can describe equally difficult childhoods and still receive opposite classifications. The difference lies in whether the story holds together, not whether the childhood was good.

Main built the AAI specifically to “surprise the unconscious.” The goal is to reveal that working model through the manner of a person’s talk about childhood, not just its content.

The Four AAI Classifications

These four adult categories map onto the child patterns Ainsworth identified in the Strange Situation, plus the disorganized category Main and Solomon later added.

• Secure/autonomous (F): Discusses childhood experiences openly and coherently, acknowledging both positive and negative events. Most common among parents of securely attached infants.
• Dismissing (D): Minimizes or denies the importance of childhood experiences, especially negative ones. Most common among parents of anxious-avoidant infants.
• Preoccupied (E): Remains overinvolved with childhood memories, appearing overwhelmed, confused, or angry while discussing them. Most common among parents of anxious-resistant infants.
• Unresolved (U): Shows lapses in reasoning or discourse when discussing loss or abuse that has not been worked through. Most common among parents of disorganized infants.

This distribution holds fairly steady across many countries, though it shifts sharply in clinical samples, where far fewer adults are classified secure.

Predicting Children’s Attachment From Parents’ AAI Scores

Fonagy et al. (1991) gave the AAI to 96 women before their children were born. The children’s attachment was then classified with the Strange Situation at 12 and 18 months.

The correlation was strong. It was strongest for autonomous mothers and secure children. Because the interview came before birth, it could not simply reflect the mother’s current relationship with the child.

Pooling every study then available, van IJzendoorn (1995) found roughly 70 to 75% concordance between a caregiver’s AAI classification and their infant’s Strange Situation classification.

That held even across a huge range of samples.

He calculated that it would take over a thousand further null-result studies before this link could be reduced to statistical insignificance.

Transmission is not automatic, though. Some parents who reported insecure childhoods went on to raise securely attached children, apparently after mentally working through their difficult early experiences (Main et al., 1985).

Critical Evaluation

Strengths and Widespread Influence

Attachment theory is among the most influential theories of human socioemotional development globally, adopted widely by clinicians, educators, child welfare professionals, and parents.

It offers a framework for understanding children’s behavior. This helps especially where there has been relational adversity.

It has been applied in various contexts, including social work, clinical practice, health visiting, training for foster and adoptive parents, parenting education, forensic contexts, and professional development for teachers.

The theory integrates multiple disciplines, including psychoanalysis, ethology, cognitive psychology, and evolutionary biology, addressing fundamental human emotional and relational dynamics.

At its best, attachment research helps practitioners understand the quality of child-carer relationships, especially when a child is distressed. It also guides efforts to improve family relationships.

Misunderstanding of Attachment Theory

The term “attachment” itself can have significantly different meanings for different people, leading to uncertainty about the boundaries of behaviour influenced by attachment processes.

It can be used as a loose metaphor for relationship-based interventions by people who may not have an accurate understanding of the concept.

For example, attachment parenting, a parenting philosophy derived from attachment theory, often employs the term loosely, leading to potential misinterpretations and oversimplifications.

Practitioners of attachment parenting may conflate specific parenting practices (e.g., breastfeeding, co-sleeping, baby-wearing) with scientifically validated attachment behaviors, potentially fostering confusion.

Simplified and Outdated Guidance in Attachment Practice

Although attachment theory provides valuable insights into human relationships and development, much of the guidance given to practitioners remains oversimplified and outdated.

Clinicians, educators, and social workers are often taught versions of attachment theory that rely on early interpretations of Bowlby’s work, rather than the nuanced, evidence-based findings emerging from modern research.

In practice, this has created a gap between attachment researchers and practitioners.

Training materials and policy guidance often fail to explain key technical concepts such as Bowlby’s behavioral systems model, Ainsworth’s framework of sensitivity, or the criteria used to categorize disorganized attachment.

Instead, general terms like attachment, security, and sensitivity are used loosely and inconsistently, blurring their precise scientific meanings.

Why These Misunderstandings Persist

Many practitioner guides continue to emphasize Bowlby’s early writings, which tended to overstate the long-term impact of early childhood experiences while neglecting the complexity and plasticity revealed in later research.

This static interpretation overlooks decades of progress in understanding how attachment patterns evolve, interact with context, and influence resilience.

Another key reason for confusion is Bowlby’s deliberate use of simple, accessible language to engage policymakers and the public.

While this helped spread awareness, it also led to misunderstandings, as everyday terms like bonding and security became detached from their original scientific definitions.

Even Bowlby himself later acknowledged the risks of oversimplification, noting that using ordinary language made it difficult to communicate his ideas with the precision required for scientific and clinical use.

Examples of misconceptions from Bowlby’s early works that still persist include:

• Confusion around terms like “maternal deprivation,” “separation,” and “continuity,” which were initially used broadly and ambiguously.

• An oversimplified view suggesting that more separations inevitably result in worse outcomes, despite Bowlby privately recognizing more nuanced influences.

• A disproportionate emphasis on the mother as the primary attachment figure, despite Bowlby later clarifying that children can have multiple attachment figures.

The gap between research and practice has allowed commercial trainers and simplified resources to thrive, often offering misleading or overly generalized interpretations of complex attachment concepts.

Improving clarity and updating training materials could significantly enhance the practical application of attachment theory.

Misuse of Attachment Language in Child Welfare Practice

In child welfare practice in the UK, attachment terminology is sometimes used to support conclusions practitioners have already made, rather than guiding their initial assessments.

Practitioners may rely on their intuitive judgments about family situations and then use attachment-related language afterward to justify these judgments.

Even unintentionally, this can be problematic.

It often results in an overly narrow focus on the mother-child relationship, placing excessive responsibility on the mother.

Consequently, this practice can overshadow other important factors that impact a family’s wellbeing, such as their socioeconomic circumstances, available social support, or potential developmental issues affecting the child.

This approach is shaped by priorities in the UK’s child protection system. It often favors immediate procedures over long-term family understanding.

Temperament vs. Attachment Debate:

Psychologist Jerome Kagan argued that infant attachment behaviors might reflect innate temperament rather than caregiver sensitivity alone, challenging the view that caregiver behavior exclusively determines attachment styles.

According to Kagan, inherently difficult or irritable infants might naturally provoke less sensitive caregiving responses, complicating causality between caregiver behavior and attachment outcomes.

Research acknowledges a significant interplay between temperament and caregiving behaviors in shaping attachment development.

Omitting this discussion could lead to an overly deterministic interpretation of attachment theory.

Cultural and Social Context Critiques:

Attachment theory has faced criticism for its Western-centric focus, with cross-cultural research highlighting variations in attachment behaviors across diverse societies.

Studies indicate cultural differences, such as higher rates of anxious-resistant attachment among Japanese infants and more frequent avoidant classifications among German infants.

Including these cultural considerations would enhance the theory’s generalizability and help readers understand attachment behaviors in broader social contexts.

Contemporary Research

A large meta-analysis has since tested these transmission claims. Verhage et al. (2016) pooled three decades of AAI transmission studies into one synthesis.

Aim: To establish how strongly a caregiver’s AAI security predicts a child’s attachment security. And whether caregiving sensitivity explains that link.

Method: The team pooled data from 58 studies and more than 4,800 parent-child pairs. Where sensitivity had been measured, they also tested whether it explained the AAI-to-attachment link.

Results: The overall link between caregiver AAI security and child attachment security held up as robust. Caregiving sensitivity, though, explained only a modest part of it.

Conclusion: Verhage et al. (2016) called this shortfall the “transmission gap.” Sensitivity is a real but partial explanation. Some other mechanism, such as a parent’s ability to reflect on mental states, likely carries the rest.

This is a large, cumulative meta-analysis, so it sits near the top of the evidence for this question. It is not beyond challenge, though.

Barbaro et al. (2017) argue that the analysis focuses too narrowly on the shared caregiving environment. They point out that twin and adoption studies consistently link genetics and individual-specific experience to attachment outcomes too.

This is not a claim that transmission is illusory. Verhage et al.’s pooled effect across nearly 5,000 pairs is too large and consistent for that.

A separate study has tested how far the transmission finding generalizes beyond traditional family structures. Carone et al. (2023) gave the AAI to lesbian mothers, gay fathers, and heterosexual parents who had used assisted reproduction. Classifications were distributed similarly across all three family types.

References

Ainsworth, M. D. S., & Bell, S. M. (1970). Attachment, exploration, and separation: Illustrated by the behavior of one-year-olds in a strange situation. Child Development, 41, 49-67.

Ainsworth, M. D. S. (1973). The development of infant-mother attachment. In B. Cardwell & H. Ricciuti (Eds.), Review of child development research (Vol. 3, pp. 1-94) Chicago: University of Chicago Press.

Ainsworth, M. D. S., Blehar, M. C., Waters, E., & Wall, S. (1978). Patterns of attachment: A psychological study of the strange situation. Lawrence Erlbaum.

Ainsworth, M. D. S. (1991). Attachments and other affectional bonds across the life cycle. In C . M. Parkes, J. Stevenson-Hinde, & P. Marris (Eds.), Attachment across the life cycle (pp. 33-51). London: Routledge.

Ainsworth. M. D. S., & Wittig, B. A. (1969) Attachment and exploratory behaviour of one-year-olds in a strange situation. In: B. M. Foss (Ed.) Determinants of infant behaviour, IV. London: Methuen, p. 111-136.

Bowlby, J. (1958). The nature of the childs tie to his mother. International Journal of Psychoanalysis, 39, 350-371.

Bowlby J. (1969). Attachment. Attachment and loss:   Vol. 1. Loss. New York: Basic Books.

Bowlby, J., and Robertson, J. (1952). A two-year-old goes to the hospital. Proceedings
of the Royal Society of Medicine, 46, 425–427.

Bowlby, J. (1973). Attachment and loss, Vol. 2: Separation. New York: Basic Books.

Bowlby, J. (1980). Attachment and loss, Vol. 3: Loss, sadness and depression. New York: Basic Books.

Bowlby, J. (1988). A secure base: Parent–child attachment and healthy human development. New York: Basic Books.

Cooke, J. E., Kochendorfer, L. B., Stuart-Parrigon, K. L., Koehn, A. J., & Kerns, K. A. (2019). Parent–child attachment and children’s experience and regulation of emotion: A meta-analytic review. Emotion, 19(6), 1103.

Dollard, J. & Miller, N.E. (1950). Personality and psychotherapy. New York: McGraw-Hill.

Dugan, K. A., Fraley, R. C., Gillath, O., & Deboeck, P. R. (2024). Testing the canalization hypothesis of attachment theory: Examining within-subject variation in attachment security. Journal of personality and social psychology, 126(3), 511.

Feeney, B. C. (2004). A secure base: responsive support of goal strivings and exploration in adult intimate relationships. Journal of Personality and Social Psychology, 87(5), 631.

George, C., & Solomon, J. (1996). Representational models of relationships: Links between caregiving and attachment. Infant Mental Health Journal, 17(3), 198-216.

Girme, Y. U., Jones, R. E., Fleck, C., Simpson, J. A., & Overall, N. C. (2021). Infants’ attachment insecurity predicts attachment-relevant emotion regulation strategies in adulthood. Emotion, 21(2), 260.

Harlow, H. F. & Zimmermann, R. R. (1958). The development of affective responsiveness in infant monkeys. Proceedings of the American Philosophical Society, 102, 501 -509.

Hill, C., Vasiliou, V. S., Sirois, F. M., Hughes, O., & Thompson, A. R. A meta-analysis of self-compassion and attachment in adults. Psychology and Psychotherapy: Theory, Research and Practice.

Isabella, R. A., Belsky, J., & von Eye, A. (1989). Origins of infant-mother attachment: An examination of interactional synchrony during the infant’s first year. Developmental Psychology, 25(1), 12.

Kagan, J., Reznick, J. S., Clarke, C., Snidman, N., & Garcia-Coll, C. (1984). Behavioral inhibition to the unfamiliar. Child development, 2212-2225.

Main, M., Kaplan, N., & Cassidy, J. (1985). Security in infancy, childhood and adulthood: A move to the level of representation. In I. Bretherton & E. Waters (Eds.), Growing points of attachment: Theory and research (Monographs of the Society for Research in Child Development, 50(1–2), pp. 66–104). University of Chicago Press.

Mikulincer, M., & Shaver, P. R. (2003). The attachment behavioral system in adulthood: Activation, psychodynamics, and interpersonal processes. Advances in Experimental Social Psychology, 35, 53-152.

Mikulincer, M., & Shaver, P. R. (2007). Attachment in adulthood: Structure, dynamics,  and change. New York: Guilford Press.

Prior, V., & Glaser, D. (2006). Understanding attachment and attachment disorders: Theory, evidence and practice. Jessica Kingsley Publishers.

Schaffer, H. R., & Emerson, P. E. (1964). The development of social attachments in infancy. Monographs of the Society for Research in Child Development, 1-77.

Shaver, P. R., & Mikulincer, M. (2006). Attachment theory, individual psychodynamics, and relationship functioning. The Cambridge handbook of personal relationships, 251-271.

Sroufe, L. A. (1985). Attachment classification from the perspective of infant-caregiver relationships and infant temperament. Child development, 1-14.

Van Ijzendoorn, M. H., & Sagi-Schwartz, A. (2008). Cross-cultural patterns of attachment: Universal and contextual dimensions. In J. Cassidy & P. Shaver (Eds) Handbook of Attachment: Theory, Research and Clinical Applications (pp. 880-905). New York: Guildford Press.

FAQs