John Bowlby’s attachment theory revolves around the belief that humans are biologically driven to form attachments to caregivers for survival. Babies are designed to capture attention—crying, cooing, and bonding behaviours ensure their needs are met. This process isn’t just about physical survival but also lays the foundation for emotional and social development.
Bowlby introduced the concept of the "critical period," which he defined as the first two to three years of life. During this time, a strong attachment to a caregiver is not only beneficial but necessary for healthy emotional growth. This relationship becomes the child’s "internal working model," a kind of template for how they perceive relationships and the world around them. If a child experiences a secure attachment, they are likely to grow into adults who trust others, feel confident in relationships, and can regulate emotions effectively. However, if this bond does not form during the critical period, it could lead to challenges in developing trust, managing emotions, and building relationships later in life.
Imagine a baby born into a stable, loving home, where they receive regular care and affection from their parents. The baby is comforted when they cry, fed when hungry, and soothed when scared. Over time, this consistent caregiving teaches the baby that the world is a safe place, and they begin to develop trust in their parents. By the age of two, this child is likely to feel secure and confident in exploring their surroundings, knowing that their caregivers will be there for them when needed.
Now, consider a different scenario. A baby born into an environment where caregiving is inconsistent—perhaps due to neglect, poverty, or instability—may not receive the same level of attention and care. This child might experience long periods of hunger, discomfort, or fear without a caregiver to soothe them. Without the consistent presence of a caring adult during the critical period, the child might struggle to form a secure attachment, leading to challenges later in life with trust, emotional regulation, and relationships. For this second child, the absence of a secure attachment in the early years can have lasting effects on their emotional and social development.
By visualising these two contrasting examples, it becomes easier to understand how crucial the critical period is in shaping a child’s ability to form healthy attachments.
Adoption and attachment: the intersection
Bringing adoption into the conversation adds a layer of complexity. What happens when a child is adopted outside of this critical period? This question is particularly relevant for children adopted after infancy, especially those who have experienced institutional care or multiple foster homes before finding their permanent families. For these children, the absence of early, secure attachments can sometimes result in attachment difficulties. This might manifest as difficulties trusting caregivers, managing emotions, or forming close bonds with others.
Children who have faced early disruptions in caregiving, especially those from neglected or unstable environments, might exhibit signs of what’s known as attachment disorders. These include Reactive Attachment Disorder (RAD), where a child struggles to form emotional bonds with caregivers, and Disinhibited Social Engagement Disorder (DSED), where a child shows indiscriminate friendliness or attachment to strangers. These challenges can understandably be concerning for adoptive families, raising the question: Is it too late for the child to form healthy, secure attachments?
From critical period to sensitive period: a shift in thinking
Fortunately, more recent research offers a hopeful outlook. While Bowlby’s concept of a critical period has been foundational in understanding attachment, psychologists today often speak of a "sensitive period" rather than a rigid cut-off point. The sensitive period still recognises that there is an optimal time during which forming attachments is easier and more natural for children. However, unlike the critical period, it does not imply that once this window closes, all hope is lost. This more flexible approach is crucial when it comes to adoption.
The sensitive period acknowledges that attachment is more malleable than previously thought. It reflects the growing understanding that while forming secure bonds in early life is beneficial, attachment development is a dynamic process that can continue beyond those early years. What this means for adoption is that even if a child did not have the opportunity to form secure attachments during the critical period, they still retain the ability to develop strong, meaningful relationships later in life.
Why this shift is significant for adoption
For adopted children, especially those who may have experienced early disruptions in care, this shift from critical to sensitive period thinking brings immense hope. Many children enter adoption from environments where attachment opportunities were either inconsistent or absent altogether. In the past, it was feared that missing this critical window would lead to permanent emotional damage or difficulties forming bonds later on. However, we now know that children are incredibly resilient, and with the right environment and care, they can still develop secure attachments, even if this process is more gradual.
How sensitive periods work in practice
In practice, the concept of the sensitive period suggests that while it may take more time and effort to help children form attachments outside the optimal window, it is far from impossible. Children, especially those entering new family environments through adoption, need to experience consistent, loving care to begin building trust. Over time, the child can begin to reconstruct their "internal working model"—the mental framework they use to understand relationships—by learning that their new caregivers are reliable and safe.
Research also suggests that while the early years are essential for attachment, the brain retains a degree of plasticity well into adolescence and adulthood. This means that while the task may be more challenging, it is not restricted to infancy. By providing a nurturing, supportive home environment, adoptive parents can help their children heal from early trauma and form new, secure attachments. This gradual process often requires patience, but adoptive children can flourish emotionally and socially, forming meaningful bonds with their new families.

Understanding resilience in adopted children
The shift to thinking in terms of a sensitive period also reflects how psychologists now understand resilience in children. Children who have experienced early adversity are often highly adaptable. With the right support, they can learn to trust and build secure relationships, even if they did not have the opportunity to do so during infancy. The presence of consistent, emotionally available caregivers can play a transformative role in the child’s life, helping them navigate past experiences and begin to form healthy, secure attachments.
For adoptive families, this understanding offers a more optimistic perspective. The sensitive period allows for greater flexibility in the timeline of attachment formation and reinforces the importance of creating a safe and nurturing environment for the child, no matter when they were adopted. Whether the child is two, five, or older, the ability to bond remains. It may take time, but the sensitive period approach reassures families that attachment is not limited to a rigid window early in life.
Hope for adoptive families: building new bonds
For adoptive parents, understanding Bowlby’s work can be both eye-opening and reassuring. The road to secure attachment for children who have experienced early disruptions might be different, but it’s not impossible. The key is patience, consistency, and an unwavering commitment to providing a secure and loving home. Children who have faced early adversity often need more time to learn that their new caregivers are reliable and trustworthy. Establishing routines, being emotionally available, and consistently responding to the child’s needs are all essential steps in helping the child rebuild trust.
While some adoptive children might come from backgrounds where early attachment was absent, they can still thrive in their new families. As they form new bonds, their internal working model begins to change. The child who may have once struggled with trust or emotional regulation can, over time, learn to rely on their new caregivers and develop the skills needed for healthy relationships. The journey might be longer and come with unique challenges, but it is far from impossible.
Practical tips for adoptive parents
Consistency is key: Children who have experienced disruptions in care may take longer to trust. Consistent routines and responses can help the child feel secure.
Example: Imagine you’re the parent of a four-year-old who was recently adopted after spending time in multiple foster homes. The child may have learned to expect that caregivers come and go. To help the child feel secure, you establish a consistent bedtime routine. Every night, you read a story together, give them a warm bath, and tuck them in at the same time. This predictable routine reassures the child that you will be there, helping them feel safe. Over time, the child starts to settle more easily because they know what to expect and trust that you’ll be there every night.
Be emotionally available
A child who has struggled with attachment might test boundaries or seem distant. It's important for caregivers to remain emotionally present, offering reassurance and comfort even when the child appears resistant.
Example: You notice that your child becomes distant whenever they get upset, refusing to talk or even making angry outbursts. Instead of withdrawing yourself or punishing them for the behaviour, you remain calm and offer comfort, letting them know you’re available when they’re ready to talk. You say things like, "I’m here when you’re ready," or give a comforting hug. Even if they don’t respond immediately, your consistent emotional presence signals that they can trust you to be there no matter what.
Understand trauma
Some children have experienced early trauma, which can affect their ability to form attachments. Being trauma-informed helps parents respond in ways that are compassionate and supportive of healing.
Example: Your child reacts strongly to loud noises or sudden changes, becoming anxious or panicked. Knowing that early trauma can lead to heightened sensitivity to stress, you create a calm, quiet environment at home. You use gentle tones and provide warnings before transitions, such as saying, "In five minutes, we’re going to leave for school." You also educate yourself on trauma responses and learn to interpret your child’s behaviours as signs of anxiety rather than defiance, helping you respond with compassion instead of frustration.
Seek professional help if needed
Therapists who specialise in attachment issues or trauma can offer support, both for the child and the adoptive parents, to navigate any challenges that arise.
Example: After several months, you notice that despite your best efforts, your child struggles with severe separation anxiety and has difficulty forming close bonds. You decide to consult a therapist who specialises in attachment and adoption-related trauma. The therapist works with both you and your child, offering strategies to help the child manage anxiety and build trust in your relationship. Therapy sessions provide a space for your child to express their fears and emotions in a safe, supported way.
Patience, patience, patience
Building trust and attachment is a gradual process, particularly for children who have faced early disruptions. It can take time, but progress will come with continued love and support.
Example: Your child resists affection, refuses to engage in activities with the family, or takes a long time to open up emotionally. Rather than feeling discouraged, you remind yourself that attachment takes time, especially for a child who has experienced early disruptions. You continue to offer love and care without pressuring the child to respond in a specific way. Over time, through consistent and patient efforts, you begin to see small signs of progress—perhaps they initiate a hug or come to you when they’re feeling upset. Each small step is a sign of growth, and you stay committed, knowing that attachment is a long-term process.
Walking the path together
For adoptive families, it’s empowering to know that attachment isn’t a one-size-fits-all process. Children who have experienced early disruptions can still form strong, lasting bonds with their adoptive families, even if their path to attachment is different. It’s all about providing the right environment—one of love, patience, and consistency.
Here at Walk Together, we are committed to walking alongside you every step of the way, helping you navigate the complexities of adoption and attachment. While the journey might be different for each family, the destination—secure, loving relationships - is always achievable.
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