The challenge of surveys

The Public Religion Research Institute (see here) is out with a new survey on the "complexities of white the working class" in the U.S.  One of their charts (see below) has some interesting findings.

The research shows that" Southern white-working class Americans stand out from white working-class Americans in the Northeast, Midwest, and West on a number of cultural attitudes and attributes."  The research reminds us again of the challenges of interpreting surveys when using categories or labels without precise definitions.