Procedure : Longitudinal study, 60 newborn babies and their mothers from a working class area of glasgow . Studied each month for the first year of their lives in their own homes and again after 18 months . Observations and interviews ( whom infants smiled at , whom they responded to , who caused them distress ) . Separation protest was assessed in everyday situations ( child being left alone in a room , left alone with others , left in their pram outside the house , left in the cot at night ) Stranger anxiety was assesses by the researcher starting each home visit by approaching the infant to see if this distressed the child .
