The Bucharest Early Intervention Project (Zeanah et al., 2005)
1. Assessed attachment in 95 children aged 21-31 months who had spent most of their lives in institutional care, compared to a control group of 50 children who had never lived in an institution
2. Attachment type was measured using the Strange Situation
3. Carers were also asked about unusual social behaviour including clingy, attention-seeking behaviour directed inappropriately at all adults