There were 8 stages: Stage 1 – Mother and child enter, Stage 2 – The child is encouraged to explore by the mother, Stage 3 – Stranger enters and attempts to interact with child, Stage 4 – Mothers leaves leaving stranger and child, Stage 5 – Mother enters and the stranger leaves, Stage 6 – Mothers leaves, Stage 7 – Stranger returns and Stage 8 – Mother returns and interacts with child.