deprivation - had an attachment but has now been broken
privation case srudy - genie - experienced extreme cruetly - never formed an attachment - physically and mentally underdeveloped
rutter - romanian orphan study - adopted after 6 months showed insecure attachment - little effect if adopted before 6 months
pro rutter - longitudinal - saw effects over a long time
hodges and tizard - studied earlt institutional care - adopted group had strong family relationships - those stayed in nursery showed weaker relationships