Generational and Time Period Differences in American Adolescents' Religious Orientation, 1966-2014 Twenge, Jean M. ; Exline, Julie J. ; Grubbs, Joshua B. ; Sastry, Ramya ; Campbell, W. Keith Abstract Publication: PLoS ONE Pub Date: May 2015 DOI: 10.1371/journal.pone.0121454 Bibcode: 2015PLoSO..1021454T