-visited at home every month for the first year and then again at 18 months
-they asked the mothers questions about how the babies acted in everyday separations to measure separation anxiety and attatchment
-they also assessed stranger anxiety
findings
-between 25-32 weeks 50% showed signs of separation anxiety towards a specific attatchment (person who shows reciprocity, not who spend the most time with them)
-by 10 months 80% has a specific attatchment and 30% has multiple attatchments (after a specific attatchment)
AO3 - ecological validity
-in own home
-observation done by parentsmostly
-ordinary activities
=behaviour unlikely to be affected by the presence of strangers
:( could lie due to social desirability factors
AO3 - longitudinal design
-can see development
-minimised individual differences (noticeable and can account for)
:( would be quicker to do a cross sectional design
:( people could drop out
whats a cross sectional design
different kids at different ages
AO3 - sample
:) large volume of data collected
:( population validity - same social class and city
:( temporal validity - 50 years ago
= child rearing processes vary throughout history and cultures
AO3 - 4 stages
lead to the formulation of the 4 stage theory to characterise infants attatchments
