I would probably throw it in and point out what you did. It's obviously not going to be the same as doing research for 2 years and being first author on a basic science pub, but it's something. I had a 4 hour upper level course in undergrad that I got an A in that was "undergrad research" or something (you can only get credit for it one semester, so even though I kept doing research after that I only had the "class" once). I just had a month of M3 that was research class...aced it too. It doesn't mean I won't talk about the research I did on my apps and CV.
I guess my point is, research is research, it doesn't matter if it's a class you get a grade in. That's pretty standard for universities to do. The only thing here is it sounds like you were just data collecting, not taking part in a lot of the full process. I'm sure it was still a good experience and go ahead and talk about it...especially if you wind up getting a pub (at least an acknowledgement, if not an authorship). I would make sure you understand what the goal/accomplishments of the research was, not just the method you collected data.
