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.