One approximate reference is: http://www.amazon.com/Why-Marriages-Succeed-Fail-Yours/dp/0684802414/ref=sr_1_1?ie=UTF8&qid=1297822411&sr=8-1 http://www.amazon.c

One approximate reference is: http://www.amazon.com/Why-Marriages-Succeed-Fail-Yours/dp/0684802414/ref=sr_1_1?ie=UTF8&qid=1297822411&sr=8-1 http://www.amazon.com/Why-Marriages-Succeed-Fail-Yours/dp/06... Basically, the author did studies and interviews and found that some couples who fight frequently do still have a healthy marriage. This goes against some common-sense notions, of course. The important thing was that each thought the other one heard and understood their point of view. I can't recall if the feeling that progress was made to resolve the dispute mattered as well.