New favorable Atkins SCOTUS decision: Brumfield v Cain

From SCOTUS blog.

• Holding: Because the inmate’s evidence of intellectual disability satisfied the requirements of 28 U.S.C. § 2254(d)(2), he was entitled to have his claim based on Atkins v. Virginia, in which the Court held that the Constitution prohibits the execution of the mentally disabled, considered on the merits in federal court.
• Judgment: Reversed and remanded, 5-4, in an opinion by Justice Sotomayor on June 18, 2015. Justice Thomas filed a dissenting opinion in all but Part I-C, of which Chief Justice Roberts, Justice Scalia, and Justice Alito joined. Justice Alito filed a dissenting opinion, in which Chief Justice Roberts joined.

Click here for ruling and access to documents.

Click here for links to all prior Brumfield related documents available at this blog

Sharing Standards to Guide the Use of Clinical Judgment in the Field of Intellectual Disability via BrowZine

Standards to Guide the Use of Clinical Judgment in the Field of Intellectual Disability
Luckasson, Ruth; Schalock, Robert L.
Intellectual and Developmental Disabilities, Vol. 53 Issue 3 – 2015: 240 - 251

10.1352/1934-9556-53.3.240

University of Minnesota Users:
http://login.ezproxy.lib.umn.edu/login?url=http://www.aaiddjournals.org/doi/10.1352/1934-9556-53.3.240

Non-University of Minnesota Users: (Full text may not be available)
http://www.aaiddjournals.org/doi/10.1352/1934-9556-53.3.240

Accessed with BrowZine, supported by University of Minnesota.

WAIS-IV US/Canadian norms controversy---articles for readers to review

I previously provided an FYI post on a hot topic in Canada...claims that the new WAIS-IV Canadian norms were flawed.  There are now three articles outlining the different arguments.  The three articles, published in JPA, can be found here, here, and here.

I continue to not comment on this controversy given my obvious conflict of interest as a coauthor of the competing WJ-IV.

Kevin McGrew

Another Flynn effect (norm obsolescence) meta-analysis

 (click on image to enlarge)

A second massive meta-analysis of the Flynn effect (norm obsolescence) was recently published (Pietschnig & Voraseck, 2015).  The study investigated different Flynn effect ability domain effects (by Gf, Gc, Gv), and other moderating variables.  However, the most important conclusion is that the authors conclude that the 3 IQ points per decade rule-of-thumb appears to be the best estimate of the FE on global IQ scores.  This conclusion is consistent with the Trahan et al. (2014) meta-analysis and the recent AAIDD recommendation.

AAIDD chapters on intellectual functioning and the Flynn effect - overdue post

(Click on image to enlarge)

It has been along time since I've been able to devote time to any of my three professional blogs.  I have been unbelievably busy with travel and professional presentations.  In fact, I have been so busy that I failed to feature two of my own recent Atkin's death penalty related book chapters that appeared in the new AAIDD book "Determining Intellectual Disability in the courts: Focus on capital cases." I have made these two chapters available via the MindHub web portal but do not believe I featured them at this blog (or at IQ's Corner).  One chapter deals with assessment of intellectual functioning issues and the other IQ test norm obsolescence (aka., the Flynn Effect).  The references (with links) are below.

McGrew, K. (2015a). Intellectual functioning. In Polloway, E. (Ed.), Determining Intellectual Disability in the courts: Focus on capital cases (pp. 85-111). Washington, DC: American Association on Intellectual and Developmental Disabilities.

McGrew, K. (2015b). Norm obsolescence: The Flynn Effect. In Polloway, E. (Ed.), Determining Intellectual Disability in the courts: Focus on capital cases (pp. 155-169). Washington, DC: American Association on Intellectual and Developmental Disabilities

Sharing A negative Flynn Effect in France, 1999 to 2008–9 via BrowZine

A negative Flynn Effect in France, 1999 to 2008–9
Dutton, Edward; Lynn, Richard
Intelligence, Vol. 51 – 2015: 67 - 70

10.1016/j.intell.2015.05.005

University of Minnesota Users:
http://login.ezproxy.lib.umn.edu/login?url=http://www.sciencedirect.com/science/article/pii/S0160289615000653

Non-University of Minnesota Users: (Full text may not be available)
http://www.sciencedirect.com/science/article/pii/S0160289615000653

Accessed with BrowZine, supported by University of Minnesota.


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Kevin McGrew, PhD
Educational Psychologist
Director
Institute for Applied Psychometrics
www.themindhum.com
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