Observed 60 Glaswegian babies for 18 months, mostly from skilled working class families
Longitudinal study - strengths/weaknesses
Mothers/babies were visited once a month for 1 year and then again at 18 months
Researchers asked the parents to observe their children in different circumstances, keep a diary of their observations and report back to the researchers
Examples of "circumstances": Left alone in a room, left alone with a stranger, left alone in their cot
Stranger anxiety - also directly observed by S&E when they visited the families