Well Ichiban, I've got to tell you, this is a horrible webpage. If you want people to be forthcoming with you and create an account of some sort, you've got to be forthcoming with them. That page doesn't say anything about who the organization is, who sponsors it, what the tests are about, what the privacy policy is, or what the results will be used for. There's an admin notice that goes to somebody at SUNY Rochester. That's it. There's no welcome, no thanks-for-participating, nothing that tells potential respondents enough to trust your organization with the information given.
I suggest going back and revamping the page entirely.