## Friday, October 17, 2008

### WJ III: Guttman Radex MDS analysis

More on "Gf=g revisited" thread (click here for original post) that produced some excellent discussion (click here) on the NASP listserv.

In response to the request for the application of Guttman's Radex MDS model to the Woodcock Johnson III (in age 9-13 norm sample), I looked through my old files and found a 3D MDS WJ III model that I completed a number of years ago. The slides have been posted in a pdf file for viewing. It would take a manuscript to explain and interpret everything....I hope the broad stroke hypotheses (esp. regarding the nature of three dimensions) stimulate some thought and discussion.

Yesterday I completed a new 2D model across all school-age subjects (6-18 years). I hope to post those findings within the week. Stay tunned.

[Conflict of interest disclosure - I'm a coauthor of the WJ III]

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