Sunday, February 20, 2011

Research brief: WAIS-IV US-Canadian factor and score comparability

The transportability of the meaning of an intelligence test batteries composite scores across countries/cultures is important when a test is originally developed and normed in one country and is then adapted and used in a second country.

Bowden et al (2010) recently investigated the factorial invariance of the WAIS-IV across US and Canadian samples. The results are summarized in the abstract below (click to enlarge). The WAIS-IV was found to measure the same theoretical constructs across the two countries. However, the reported difference in latent mean factor intercepts indicated that the WAIS-IV provides higher scores with Canadian subjects. The need for Canadian norms are suggested.

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