Procedure (details not required but good knowledge)

• Study involved 60 babies - 31 boys and 29 girls all of which were from Glasgow and majority from a skilled working class family
• Researchers visited babies and mothers in their own homes every month for the first year and again at 18 months
• Researchers asked the mothers questions about the kind of protest their babies showed in seven everyday separation

  For example , adult leaving the room ( separation anxiety )
• Researchers also assessed stranger anxiety - babies' anxiety response to unfamiliar people
• Quantities of stranger anxiety and separation anxiety were designed to measure the babies' attachment