31st Skeptic's Circle
Check out the great post from Kev on being a DAN! approved doctor.
A critical look at science in the autism world
Application of More Restrictive Criteria
In July 2003 the CDDS applied a more restrictive criteria to the eligibility requirement for their autism services (Rollens, 2004). This severely confounds the decrease that is noted in this period, as it makes it almost certain that there would be a drop. Furthermore, a review of Figure 4. shows that the decrease does not occur until after July 2003, and the implementation of the more restrictive criteria. This is not clear in the correlational graph in Geier & Geier (2005).
I conclude that Geier & Geier (2006) does not necessarily show what it claims to. I strongly second the position that Joseph at the "Autism - Natural Variation" blog, put forth, namely that the Journal of American Physicians and Surgeons peer reviewers re-examine this study and consider retraction.
Notes: A letter to the editor outlining these points will be submitted for publication in the Journal of American Physicians and Surgeons.
The following links are to blogs which discuss this issue and which serve as references to this post.
Department of Developmental Services (2005). Data Interpretation Considerations and Limitations.http://www.dds.ca.gov/FactsStats/pdf/CDER_QtrlyReport_ Consideration_ imtations.pdf. Accessed Friday January 13, 2005.
Department of Developmental Services (2006). Quarterly Client Characteristics Reports.http://www.dds.ca.gov/FactsStats/quarterly.cfmAccessed Friday January 13, 2005.
Friis, R. H., Sellers, T. A. (2004). Epidemiology for public health practice, 3rd ed. Sundbury, MA: Jones and Bartlett Publishers.
Geier, D. A., & Geier, M. R. (2006). Early Downward Trends in Neurodevelopmental Disorders Following Removal of Thimerosal-Containing Vaccines. Journal of American Physicians and Surgeons. 11(1), 8-13.