The Strange Situation was designed by an American researcher (Ainsworth) based on a British theory (Bowlby) and these ideas may not apply to other cultures
Ainsworth may be imposing her Strange Situation methodology and ideas of attachment that work in one culture, to another different culture (where they do not work)
For example in Britain and the USA, lack of affection on reunion may indicate an avoidant attachment. However, in Germany such behaviour is likely to be interpreted as independence rather than insecurity
Studies conducted in different countries may not be completely matched for characteristics of the sample or aspects of the methodology
For example, studies in different countries may use children of different ages and social classes. Environmental variables may also differ e.g. using smaller rooms which might encourage babies to explore more or using different toys in the study
In van Ijzendoorn's cross-cultural investigations of attachment, Israel and Japan were found to have the highest percentage of anxious-resistant children
In van Ijzendoorn's cross-cultural investigations of attachment, secure attachment was found to be the most common attachment type in all the countries investigated