WISC-III Arithmetic test: CFA with WJ III

Ok....I'm officially a geek. I'm having lunch at a grant-related mtg in DC and making a post to my blog in response to a thread on the IAPCHC listserv that I received via wifi during the meeting (yes...I can get a bit distracted when asked to sit all day)
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The following question was posted to the listserv today:

• "The Arithmetic subtest on the WISC seems to be a lost child trying to find a home. On the WISC III it was in the VCI which was primarily a Gc area, then on the WISC IV it falls within the Gsm area. But when I read the WISC Essentials book, Arithmetic is used to help find Gf. Of course, it goes without saying (or does it) that Arit falls under Gq.

• Question....is Arithmetic really a lost child? Does it have a home or does it have multiple homes (a mansion, townhome, and a small studio). "

A recent joint CFA study of the WISC-III and WJ III (Phelps, McGrew, Knopik & Ford, 2005) found, when evaluated within the context of a relatively "complete" set of CHC indicators, the WISC-III Arithmetic test is primarily a measure of Gq (.60+ loading) , with some possible low Gs variance (.20+ loading).

Technorati tags: CHC theory. psychology. intelligence. WISC-III. Wechsler. iq testing. psychological testing. intelligence theory. Woodock Johnson. WJ III. quantitative. Gq.
processing speed. Gs.