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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