Acommon finding in the study of aggression is that exposure to television is associated with increased aggressive behavior in children. you are curious as to whether peer pressure is really to blame (peer pressure encourages you to watch television and peer pressure encourages you to be aggressive). you are questioning which of the following criteria of causation?
a) the criterion of covarianceb) the criterion of temporal precedencec) the third-variable criteriond) the criterion of external validity

C) the third-variable criterion

Explanation:

Here, the two variables which are studied are the exposure of the children to TV and the aggression in the child. The independent variable is the exposure of the children to TV and the dependent variable is the aggression in the child.

However, you are wondering whether another variable i.e., peer pressure is influencing the two factors. When another variable is influencing two variables it is called the third variable. Hence, I am questioning the the third-variable criterion.

if interdependence implies a two-way dependence, and if each partner is equally dependent on the other for success, then there is an equal commitment to the making the partnership successful. the advantage is sustainability of the relationship, the disadvantage is that decisions are "democratic" and therefore may take longer to reach and more likely to be a compromise (which is not always the best solution). as the interdependence moves away from equality, the decisions become more influenced by the more independent partner. in the extreme the relationship becomes more dictatorial and more like "master-slave". generally the relationship has less commitment in both directions and is more likely to be temporary.

if one generalizes (and one shouldn't), equity partnerships, which is probably what is implied by interdependence, can be slow to progress or change but durable. the extreme alternative, independent-dependent partnerships tend to be efficient but more fragile.

hope this but you will have to site your own evidence. : )