Bowlby's Influencement Theory

In the article of 1958, Bowlby refers to the term attachment primarily as the "specific relationship between mother and child" and as a "particular pattern of behaviour demonstrated by the child to indicate an attachment".
Bowlby began research on attachment mother-child beside his observations of child behaviour as a volunteer at a facility for maladjusted children, with stories of deprivation and institutionalization. In 1951, the Bowlby presented a report to the Maternal Care and Mental Health in which it is define the relationship between adequate maternal care and mental health of the child.
Throughout his time, Bowlby distanced himself from orthodox psychoanalytic theory: he gave importance to the real experiences of the child; also,

It is a structure that includes components of emotions, perceptual, motor and cognitive. It conceived as an internal representation of self and each attachment figure, and consists of structures of implicit memory interactions with the attachment figure. The replies from this is the demands of care and comfort of the baby. Relationships with significant others are generalized in operating models that give meaning to early interpersonal experiences, serve as the basis for the assimilation and processing subsequent experiences with the Other and constitute the matrix of future interactions. With the help of these representations, the child adjusts its behaviour based on expectations formed in the common history of the report, enabling plans and strategies already stored. They serve to direct their behaviour towards the attachment figure and predict the behaviour more likely to occur in successive episodes of activation of the attachment

The Strange Situation has been developed to illustrate the operation of the attachment behavioural system in children of one year, exposing them to situations combined slight danger.
Strange Situation consists of a standard sequence of episodes lasting three minutes in a laboratory equipped for the game where the parent leaves the child twice (once in the company of a stranger and once alone). Ainsworth has developed a classification system divided into three categories to describe the model of the response of the child to the parent with which it is observed.
The author has found a close link between the way the child 's response to separation and reunion with the mother during the test, and the mother-child interaction in the home situation. Children whose mothers had proved sensitive to their signals during episodes of feeding, crying, support and face-to-face interaction at home during the first three months of life, welcome with joy the return of their mothers after a brief separation in the Strange