You can take the survey if you're over the age of 13 by visiting The Joy Project Organization research study page.
According to the website, the study addresses the relationship between eating disorder characteristics, insurance coverage and DSM-IV diagnostic criteria. There are free resources on the page for obtaining eating disorder treatment help, including hotline numbers and eating disorder treatment directories.
The benefits of participating in the study are listed as an increased "awareness of the characteristics of those affected by eating disorders." Another benefit is helping "society become more aware of the diverse characteristics of eating disorders rather than the stereotypical eating disorders." Another goal is to effect "eating disorder categorization for the DSM-V."
Probably the most important benefit of the study is to gather information on insurance coverage and participation in eating disorder treatment. In the US, we're in a crisis when it comes to eating disorder treatment. Insurance companies consistently deny coverage to people who desperately need it. By participating in this eating disorder survey, you can help this organization influence insurance companies so that hopefully, they will stop denying coverage. As stated on their site, "The information may also lead to changes in health insurance policies ... and better treatment for those that have eating disorders."