When looking at these experiments, one would consider the security of the child/caregiver attachment the independant variable, while the outcome later on in life is the dependant variable. With only these two variables at play, one could alter the independant variable and judge its causation of the dependant variable. However, this is not exactly the case with attachment, because scientists have not exactly proven a causation between the two, only a correlation. It seems there exists a thrid variable- the sensitivity of the caregiver- that influences the other two variables. If experiments regarding this third variable were conducted, one could possibly find a cause of well-being associated with attachment.
