The title of the article should have been “Shouting vs. Spanking — What should the parent choose?”
Here is a small excerpt from the article:

The single problem of modern parents, mothers and fathers alike, is that they are trying to be something– “good parents” (an identity construct) and not doing what is good for the kid only for the sake of the kid. They may be doing good for the kid, but they are also trying to reflect themselves as good parents, they are also considering their shame.  That cannot work, ever.  The kid will sense this, and the lesson they will learn is that there is no absolute right and wrong, only pleasing the boss.

http://thelastpsychiatrist.com/2009/10/shouting_vs_spanking.html

Parents must get across the idea that “I love you always, but sometimes I do not love your behavior.”
—  Amy Vanderbilt