The culutres in which parents and children are raised might act as a third variable in the development of attachment. If parents are immigrants but their child is not, differences in culture and language might affect attachment. Even when parents and children are from the same country, generation gaps often form.
I disagree with this. I think the point of these tests were to prove basic human interaction. Little if not zero language was used. Take the "Dont you look at me" game for example. Even if the parent cannot phrase the sentence in English or the child cannot understand the sentence in a foreign language the simple action of turning away would cause the child to search for the parent and the end result would still be the same. I think these games of basic love work regardless of cultural background.
I didn't even consider that variable, but it makes a lot of sense. I know a lot of a lot of students who the parents actually become dependent on because the child is the only family member who knows English. I think that this is really healthy, at least in the examples I know of because these kids become very responsible at a very early age. In the same respect though and contrary to this, the child loses a lot of his/her childhood because he/she always has family members relying on them.