I'm at the annual RN convention for my job and a good proportion of the people we work with are developmentally disabled. My boss was doing a presentation and said the above statement in relation to this group. Her point was that instead of correcting the behavior and trying to change the person, you can try and find out what their need is and fix the cause of the problem.
This is such a simple concept and something that can really be applied to all children as well. 9 times out of 10 when my son is acting up, he is tired or hungry. Feed him dinner or get him some sleep and he is a different kid. Even though I know he gets this way, you would be amazed at how long it takes me sometimes to figure out to just give him a snack. I know it's not always easy to figure out what's causing a behavior, and sometimes you just need to set expectations for kids at home and in public settings, but many behavior issues could be solved if the source of the problem could be fixed.
I just wanted to share this because it's so simple yet so profound and something to consciously think about when kids are exhibiting behaviors.