series of episodes each lasting 3 mins.
1) caregiver takes infant into lab room and they are left to explore
2) infant plays while caregiver sits
3) stranger enters and interacts with infant and caregiver
4) caregiver quietly leaves and stranger interacts with infant
5) caregiver returns and stranger leaves
6) caregiver leaves so infant is alone
7) stranger enters and interacts with infant
8) caregiver returns to greet infant
what were the procedures of the strange situation?