rationalskepticism.org

It's a bit of a pain that the paper isn't freely available, so it's hard to know exactly what they've done. There is a short paper (one of the authors here is on the paper in question) talking about something similar

http://www.aip.org.au/Congress2010/Abstracts/Monday%206%20Dec%20-%20Orals/Session_3E/Kocsis_Observing_the_Trajectories.pdf