Answers are grounded in this paper and cite their sources.
This study examined the factorial validity of scores on the Quick Discrimination Index (QDI) across three geographically dispersed samples. A multisample LISREL analysis, incorporating Bagozzi and Heatherton’s recommended aggregate procedure, indicated that the QDI three-factor oblique model was relatively stable across three geographically divergent samples. Coefficient alphas across factors and samples were satisfactory. The Lix Readability Index for the QDI items fell at the ninth-grade level.
No takes yet. Share an insight, caveat, or question.
Utsey et al. (1999) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: