Samples tend to be unrepresentative of cultures. In van IJzendoorn and Kroonenberg's study, comparisons were between countries not cultures. Within any country there are many diff cultures each w/ diff child-rearing practices. van IJzendoorn and Sagi (2001) found that distributions of attachment type in Tokyo were similar to Western studies, whereas a more rural sample had an over-representation of insecure-resistant individuals.