A strength of Ainsworth's strange situation?

-Procedure had high reliability in assessing attachment types -Ainsworth found almost perfect agreemnet of 94% between observers rating the beahviouror the infants when engaged in exploratory behaviour -High level of agreement might be due to the fact that the observations took place in strict and conrolled methods (video recordings), using predetermind behaviour categories, like proximity seeking, wich is easily notes behaviour (compared to small gesture) -Means that the measurement of attachment were confirmed as meaningful by the observers and can be accepted as reliable