Study: Van Ijzendoorn and Kroonberg
conducted a meta-analysis to look at proportions of secure, insecure-avoidant and insecure resistant attachments across a range of countries to assess cultural variation
PROCEDURE: located 32 studies where the SS had been used in investigate proportions of babies with different attachment types
32 studies were conducted in 8 countries.
studies yielded for 1,990 children
CONCLUSION: secure attachment seems to be norm in wide range of cultures, supporting Bowlby's idea, attachment is innate + universal