Electronic Thesis and Dissertation Repository


Master of Science




Dr. Donald Saklofske


Intelligence is a powerful correlate of human behaviours and characteristics, and has an important impact on many life outcomes including educational and career success, mental health, and longevity. Given the widespread influence, it is imperative that intelligence and intelligence tests are interpreted accurately. The purpose of this study is to examine the influence of demographic differences on the intelligence test scores of Canadian children using the WISC-V. Drawing from the WISC VCDN standardization data, the results suggest that ethnicity and socioeconomic status are significant predictors of IQ scores, and that differences in these variables significantly affect test performance. Further, there is some evidence that socioeconomic status acts as a mediator in the relationship between ethnicity and IQ. Given the use of the WISC-V across Canada, the results are not only important for interpretation of the test scores, but also provide valuable insight for Canadian psychological and education communities.