National Weight Control Registry

Below is a direct link to the National Weight Control Registry and their continuous study to obtain information on people trying to lose weight.

http://www.nwcr.ws/Research/default.htm

I found this study interesting because it is an ongoing study to find out different qualities people who are trying to lose weight, or are successfully doing so, have in common. One flaw I see with it right away is that in order to provide information you have to register, which may result in non-response bias because the people who are going to take the time to register themselves and provide the information are people who care about losing weight or are proud of how much weight they have lost or are currently using. The study is missing out on more people who are not being successful or do not care enough to share their practices with others.