Dorman(2003) used confirmatory factor analysis with data collected by administration of the WIHIC to 3980 high school students in Australia, Britain, and Canada. The a priori factor structure of the WTHIC was supported and was found to be invariant across country, grade level, and student gender. Alpha reliability coefficients for this sample ranged from 0.76 to 0.85 for different WTHIC scales at the student level of analysis.