Reliability of data?

[khawkins98]

First off, great to see this provided under an MIT license.

I'm curious if there is much evidence about the usability of this?

Not so much to the end if users will complete the "survey" but how much the answer they give correlates to the opinion presented if the reader is asked question X and Y separately?

I realize this question is not specific to Foursquare, but I suspect this is something the project maintainers have given some thought, and that it's something others will wonder about.