You can get white and red reflective tape at walmart in the automotive department. It's pretty much all the same stuff. A couple feet for $3-4. It's best to cut it into little strips and spread them throughout the bike.

Whether it works or not; just what kind of studies would satisfy you? You're asking this because you're trying to do your best to be seen. Would you ever feel content not stickering up your bike when you have every opportunity to do so at such little cost?