Can tutorials help prevent plagiarism?

According to Brian Jacob and Thomas Dee, they apparently can. This blog post on the Freakonomics blog (which I love) says that students who took a plagiarism tutorial before submitting papers plagiarized less frequently than those who didn't. The effect was stronger among students with lower SAT scores.
I am really excited about this study. In addition to the program self-study, our research tutorial is another project of mine. Our Distance Education Librarian, Beth, and I are overhauling it. We started with the plagiarism part. Check it out (it requires Flash). It's great to know that, at least in one case, a plagiarism tutorial was actually helpful.