High reliability as it can be replicated and has been done in many other cultures.
Validity
Attachment type is a goodpredictor of later attachments. For example, children with insecure attachments had a higher risk of mental health issues in adulthood.
Ethical issues
The study involves making the children deliberatelystressed and this may cause them psychologicalharm.
However, this causes no greater stress than if children were left with a babysitter.
Culture bound
It is designed for British and American cultures and this method may not be appropriate for studying attachment in different cultures.
