The Glasgow Study: Schaffer and Emerson (1964)
1. 60 infants from working class homes in Glasgow, began with infants ranging from 5 - 23 weeks
2. Infants were studied for 1 year
3. Mothers reported infants response to separation on a 4 point scale
4. Mothers reported who the protest was directed at
5. Stranger anxiety was measured by assessing the infants response to the interviewer