Cultural variation in attachment evaluation
+sample size (2000 babies used in total) is a strength because large samples increase internal validity by reducing the impact of anomalous results caused by bad methodology or very unusual participants
-samples are not true representation of all cultures. E.g. van Ijendoorn and Kroonenberg claimed to study countries when in fact they studied cultures. In each country there are many different cultures with different children rearing techniques. An analysis by van Ijzendoorn and Sagi found that distributions of attachment type in Tokyo (urban setting) were similar to the western studies, whereas a more rural sample had an over representation of insecure resistant individuals.
-method in 'strange situation' can be seen as biased. E.g. it is Anglo American so cannot be applied to other cultures. Trying to apply a theory or technique designed for one culture to another culture is known as imposed etic (cultural universal). E.g. etic may be the idea of lack of separation anxiety and lack of pleasure on reunion indicate an insecure attachment in the strange situation. In Germany this behaviour might be seen more as independence than avoidance
-alternative explanations for cultural similarities. E.g. different cultural differences may reflect effect of mass media that other countries might not be exposed to. For instance on child rearing techniques
-strange situation lacks validity as it might not measure attachment at all but rather looks at temperament