While there have been many approaches to classifying religious traditions in the social sciences (see Hackett and Lindsay 2008), the most popular approach is the religious tradition classification scheme, which was most carefully systematized by Steensland et al. (2000). Their widely-embraced article argued that the most accurate typology of religiosity was to sort individuals into seven distinct groups: evangelical Protestant, mainline Protestant, black Protestant, Jewish, Catholic, other religious groups, and no religion. This approach has become popularly known as “reltrad” and its usage in academic writing is voluminous. A brief search of Google Scholar indicates that over 900 published articles and books utilized the reltrad framework. However, the implementation of this typology has never been fully and accurately operationalized. [ABSTRACT FROM PUBLISHER]