What an explanation of attachment has to explain

Attachment is not just "liking" a caregiver. In this topic it means a close emotional bond in which the infant seeks proximity to a caregiver, uses them for comfort and security, and may become distressed when separated.

An explanation of attachment needs to answer three questions:

1. Why does the bond form?
2. Why does it usually form with particular caregivers rather than anyone?
3. Why might early attachment affect later development?

AQA names two explanations:

AO1 is accurate knowledge and understanding of what a theory says, including relevant terms and research. AO2 applies the theory to a concrete infant-caregiver scenario. AO3 evaluates its evidence, assumptions, strengths, limitations and wider implications.

For this lesson, AO2 usually means applying an explanation to a baby and caregiver. AO3 usually means asking whether the explanation gives the best account of real attachment behaviour.

Learning theory: attachment through association and reinforcement

Learning theory is a behaviourist explanation. It argues that attachment is not inborn. Instead, infants learn attachment because caregivers become associated with the reduction of discomfort and the production of pleasure.

The classical conditioning version is:

This is why learning theory is sometimes called the "cupboard love" explanation: the infant is said to attach to whoever is associated with feeding.

The operant conditioning version adds reinforcement. Hunger is uncomfortable, so feeding removes discomfort. Food is a primary reinforcer because it satisfies a biological need. The caregiver becomes a secondary reinforcer because they are associated with the food and comfort. Crying may also be reinforced: the baby cries, the caregiver responds, and the baby is fed or comforted. The caregiver may also be negatively reinforced because responding stops the unpleasant crying.

AO1 usefulness: Learning theory gives a clear, step-by-step account using established behaviourist terms. A strong outline should include both classical conditioning and operant conditioning, not just "the baby gets food".

AO2 usefulness: If a scenario says a caregiver does most feeding, learning theory predicts the infant may become attached to that caregiver because they are associated with the pleasure and drive reduction of feeding.

AO3 usefulness: The weakness is that real attachment does not seem to depend only on food. Harlow's rhesus monkeys preferred the soft cloth surrogate to the wire surrogate even when the wire surrogate provided milk, suggesting contact comfort can matter more than feeding. Schaffer and Emerson's Glasgow study is also often used as background AO3 evidence because infants were more likely to attach to caregivers who were sensitive and responsive, not necessarily the person who fed them most. This challenges a simple food-based explanation.

Learning theory is still useful because association and reinforcement probably help maintain caregiver-infant interaction. Its problem is being too reductionist if it treats a complex emotional bond as only a stimulus-response habit.

Bowlby's monotropic theory

Bowlby's monotropic theory is an evolutionary explanation. It argues that infants are biologically prepared to form attachments because staying close to a protective caregiver increases survival.

Bowlby did not mean that only a biological mother can be an attachment figure. In his 1958 paper he clarified that he was concerned with the person who "mothers" the child: the person who provides the main caregiving relationship. In AQA answers, it is better to write "primary attachment figure" than to imply that attachment must be to a mother.

The theory has four linked claims.

The theory is called monotropic because Bowlby gave special status to the first or main attachment relationship. Other attachments can form, but Bowlby saw the primary attachment as particularly important.

AO1 usefulness: A full outline should include innate/adaptive attachment, monotropy, social releasers, critical period and internal working model. If you only write "Bowlby says babies need mothers", the answer is too vague and can become inaccurate.

AO2 usefulness: If a baby cries when separated and calms when the main caregiver returns, Bowlby would explain this as an evolved proximity-seeking system. The crying functions as a social releaser that encourages the caregiver to return.

AO3 usefulness: Harlow's findings support Bowlby's rejection of a simple food explanation because attachment-like behaviour was directed towards the comforting surrogate rather than the food source. However, Harlow's monkeys are not human infants, so the evidence has limits. Schaffer and Emerson's findings also challenge a strict version of monotropy because many infants formed multiple attachments and sensitivity seemed important.

Critical period and sensitive period

AQA specifically names the concept of a critical period, so you need to know it as part of Bowlby's theory.

Bowlby argued that attachment should form within an early window, often taught in AQA courses as roughly the first 2.5 years. The logic is evolutionary: if attachment protects the infant, then the infant needs the attachment system to become organised early in life.

However, a strong A-level answer should not treat the critical period as a simple cliff edge. Human development is more flexible than imprinting in geese or deprivation effects in laboratory monkeys. Many psychologists therefore prefer "sensitive period" for human attachment.

AO1 usefulness: You can state that Bowlby proposed a critical period for attachment formation, and that failure to form attachments during this early period may make later attachment more difficult.

AO2 usefulness: If a scenario describes a child who had very little consistent caregiving early in life, Bowlby would predict possible difficulties with later emotional development because the attachment system may not have formed normally.

AO3 usefulness: The critical period is an evaluative pressure point. Animal studies such as Lorenz and Harlow suggest early attachment experiences can matter greatly, but generalising from animals to humans is limited. Human evidence from later institutionalisation research suggests early experience is important, but later recovery is possible. So "sensitive period" is often a better evaluative conclusion than a rigid critical period.

The internal working model

The internal working model is Bowlby's cognitive part of the theory. It explains how early attachment might shape later expectations.

A securely attached infant may build expectations like:

An infant with inconsistent or unresponsive care may build different expectations, such as uncertainty about whether others will respond or whether the self is worth care. The point is not that the baby consciously thinks these sentences. The point is that repeated experiences become expectations.

AO1 usefulness: The internal working model links Bowlby's explanation of attachment to later relationships. It is part of the theory, not a separate study.

AO2 usefulness: If a student scenario says an older child expects adults to leave or ignores help even when distressed, you can apply the internal working model by explaining that early attachment experiences may have shaped expectations of others.

AO3 usefulness: The internal working model is useful because it explains why early attachment could have continuity into childhood and adult relationships. But it can become deterministic if it implies early experience fixes all later relationships. Later positive relationships, therapy, changing family circumstances and individual agency can revise expectations.

Use this concept carefully. This lesson teaches what the internal working model is; the later lesson on the influence of early attachment develops its effects on childhood and adult relationships in more detail.

Comparing the explanations

The fastest way to improve an answer on this topic is to compare the mechanism each explanation proposes.

For AO3, avoid generic phrases such as "this lacks validity". Make the evaluation bite into the theory:

• Harlow challenges learning theory because the monkeys attached to comfort, not the food source.
• Schaffer and Emerson challenge learning theory because sensitivity and responsiveness seemed more important than feeding.
• Schaffer and Emerson challenge strict monotropy because infants often formed several attachments.
• Human evidence challenges a rigid critical period because later attachment and recovery can occur, so "sensitive period" is a more balanced conclusion.
• Bowlby's theory can be socially sensitive if interpreted as blaming mothers; a better reading is about consistent, responsive caregiving by an attachment figure, not biological motherhood.

The most balanced conclusion is not "learning theory is wrong and Bowlby is right". Learning processes may help explain how caregiver-infant routines are strengthened, while Bowlby better explains why attachment appears biologically prepared, emotionally powerful and linked to later expectations.