Date of Award
Doctor of Philosophy
Is the personality structure for intellectually talented adolescents (age 13) similar to the structure found in adults, or is it still maturing? Moreover, is it worthwhile to assess generic personality dimensions in this population if vocational interests are already assessed? Schmidt, Lubinski, and Benbow (under review) examined whether measures of preferences were construct valid for intellectually talented adolescents. One of the goals of the current research was to extend that examination to traditional personality instruments originally designed for use in adult populations. The extent to which the Multidimensional Personality Questionnaire (MPQ, Tellegen & Waller, in press) and the Adjective Check List (ACL, Gough & Heilbrun, 1983) can be used appropriately and profitably with intellectually talented 13-year olds was examined. Convergent and discriminant correlational patterns of the ACL and MPQ scales were in accordance with theoretical expectations across 91 external criteria. This provided substantial evidence for the construct validity of these instruments with intellectually talented adolescents. Another goal of the current research was to examine if the MPQ and ACL were providing incremental validity relative to one another. Initial evidence suggested that the MPQ and ACL might be assessing redundant sources of individual differences. Thus, regression equations were designed to forecast the scales of each instrument from the opposing instrument. These equations were cross-validated concurrently, predictively, and retrospectively. By combining extrinsic convergent validation and cross-validation techniques, the conceptual equivalence of actual instrument scales and the forecasted scales was examined. These analyses suggested that the MPQ was able to account for much of the psychologically significant variance in the ACL scales, with respect to the external criteria used here. A final goal was to examine whether the MPQ and ACL were providing incremental validity relative to the Strong Interest Inventory (Harmon, Hansen, Borgen, & Hammer, 1994). Interests and personality showed some degree of overlap; however, they seemed to be assessing somewhat distinct domains. In particular, they showed differential patterns of multiple correlations with external criteria. This suggests that it is psychologically informative to assess both domains.
Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/
David Burke Schmidt
Schmidt, David Burke, "Examining the construct validity of broad personality measures for intellectually gifted adolescents: are we getting unique information relative to vocational preferences? " (1998). Retrospective Theses and Dissertations. 11804.