Tuesday, December 16, 2008

IQ (ISIR) Scholar Spotlight: Tim Keith - DASII CHC CFA and gender differences in abilities



Dr. Tim "Happiness is a latent variable" Keith presented at the 2008 ISIR conference. Tim is a tremendous scholar (and friend) with tremendous expertise in structural equation modeling. He is one of two people I turn to when I need help with running CFA models. He has completed some of the best CFA studies of the major individually administered intelligence batteries. I've collaborated with him on a number of g+specific abilities studies. More recenty he has been turning his atttention to using SEM methods to evaluate gender differences in latent CHC abilities (click the following links to view his recent published research with the WJ III - conflict of interest disclosure--I'm a coauthor of the WJ III).

At the ISIR conference he presented the same type of analysis of the Differential Abilities Scales--II (DAS-II) norm data. The figure below was the best fitting model. The model provides good support for CHC interpretation of the DAS-II. At the conference his primary focus was gender differences.

Briefly, Tim's gender analyses is summarized below:

  • Females (5-17 years of age) were higher on Gs, Gsm, and Glr (actually the narrow ability of M6 - free recall memory)
  • Males (5-17 years) higher on Gv
  • No gender differences on Gc, Gf, or g.
[double click on image to enlarge]

1 comment:

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