Monday, April 30, 2012

IAP AP101 Report # 13: Problems with the 1960 and 1986 Stanford-Binet IQ Scores in Atkins MR/ID Death Penalty Cases




Often in Atkins MR/ID death penalty cases historical and contemporary IQ scores are available for review by psychological experts.  In many cases these scores vary markedly.  The courts frequently wrestle with the issue of determining what the best estimate is of the person’s general intelligence.  A review of many Atkins cases often reveals frequent mention of two “gold standard” IQ tests in reports or testimony—namely, the Stanford-Binet and the Wechsler series.

The purpose of this working paper is to alert psychologists and the courts to two little known (but extremely important) dents in the gold standard status of two versions of the Stanford-Binet—the 1960 SB and the 1986 SB IV. If a Flynn effect adjustment is made to scores from a 1960 SB, the norm date used to calculate the magnitude of the Flynn effect should be 1932…not 1960.  If SB IV scores exist in an individual’s records, experts providing opinions regarding the individual’s general level of intelligence should consider: (a) eliminating the score from consideration, (b) not give the score great weight in formulating an opinion, or (c) at a minimum, provide qualifying statements regarding the validity of the SB IV score as required by the Joint Test Standards.

IAP Applied Psychometrics 101 Report # 13 can be downloaded by clicking here.

Sunday, April 29, 2012

Friday, April 27, 2012

Article: New form of intellectual disability discovered


New form of intellectual disability discovered
http://www.sciencedaily.com/releases/2012/04/120427100111.htm

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Thursday, April 26, 2012

SCOTUS petition of the day: Herring v Florida re standard error of measurement (SEM)

http://www.scotusblog.com/2012/04/petition-of-the-day-279/


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Sunday, April 22, 2012

Law Review Article: Can Section 1983 Help To Prevent the Execution of Mentally Retarded Prisoners?




Link to above named article here.



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Article: Ranking forensic journals through content analysis





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Test post

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Saturday, April 21, 2012

My blogs were recently hacked...working on the problem

Two of my three professional blogs were hacked a couple of years ago. I reset the passwords and things were find. During the past few months they were hacked again, especially during the past few weeks. I have again resent my password and login to stronger settings to stop this. Thanks to the readers who have contacted me to notify me of these hacks. The content of some of these posts has been offensive and are not from me. I will remain as vigilant as possible, but the help of my readers is most welcome. In fact, emails from readers telling me that a post was made that looks inappropriate is usually how I first learn of the new hack attack. If this continues I will contact Blogger to see what other security measures might be necessary. Thank you for your understanding and assistance.

Friday, April 20, 2012

Article: Crime and punishment: Neurobiological roots of modern justice


Crime and punishment: Neurobiological roots of modern justice
http://www.sciencedaily.com/releases/2012/04/120418135350.htm

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FYI: National Research Council Concludes Deterrence Studies Should Not Influence Death Penalty Policy | Death Penalty Information Center

http://www.deathpenaltyinfo.org/deterrence-national-research-council-concludes-deterrence-studies-should-not-influence-death-penalty


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Monday, April 16, 2012

Article: Top-Ten Recent SSRN Downloads



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Article: Sklansky on Evidentiary Instructions and the Jury as Other



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Article: SCOTUS to tackle capital habeas competency right



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Sunday, April 15, 2012

Jonah Lehrer on Memory, Witnesses and Crime | Head Case

I saw this article when reading leading brains on the Paper.li Mobile Edition and thought you might be interested:

Jonah Lehrer on Memory, Witnesses and Crime | Head Case

Getty Images Memories aren't snapshots. They're deeply flawed reconstructions. The biggest lie of human memory is that it feels true. Although our recollections seem like literal snapshots of the p...
Read the full article on online.wsj.com


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Monday, April 2, 2012

Law Review Article: A more intelligent and just Atkins - Adjusting for the Flynn Effect in MR/ID cases




Hot of the press from the Vanderbilt Law Review is an excellent article on the issue of adjusting for norm obsolescence (Flynn effect) in Atkins MR/ID death penalty cases. I will be adding this to the Flynn Effect archive the next time I perform an update. The article is available for free PDF download at the VLR web page or here.

Click on images to enlarge







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CHC theory and the Wechsler IQ scales and test development and interpretation

In 1998 Dr. Dawn Flanagan and I published the Intelligence Test Desk Reference book which was the first thorough treatment of CHC theory (then called Extended Gf-Gc theory). This book is now out-of-print.




We then took the concepts from the ITDR and, together with Dr. Sam Ortiz, presented a cross-battery approach to interpreting the Wechsler batteries.




And again, this book is no longer in print. This also means we no longer receive any $ for sales (conflict of interest disclosure). Table of contents for first three chapters below (click on images to enlarge)






The research, theory, and conceptual material in the second book is nearly identical to the first, but it was presented in the context of how to upgrade interpretation and understanding of the Wechsler batteries according to the CHC framework. Since then the same CHC overview material has been tweaked and updated in a series of CHC cross-battery books by Flanagan et al. But, the foundation of CHC theory, and how it can be integrated within a conceptual framework of test development and interpretation, is largely the same in these newer CHC cross-battery books.

Thus, given that these "mother and father" books are no longer in print, I took the liberty of copying the first three chapters of the Wechsler oriented book and am now making them available for my readers (click here). I make this material available to provide psychologists who have not done much reading regarding CHC theory an opportunity to have access to the basic foundation of CHC theory to help them see how it can be applied to the interpretation of an intelligence battery (in this case the Wechslers). By choosing the Wechsler material this also helps understand how the Wechsler batteries are evolving (either implicitly or explicitly--see Keith and Reynolds, 2010) when viewed from the lens of CHC theory.

But, one must recognize that this material is a bit dated. An update of CHC theory was later published in 2005 (click here to access...plus some other chapters), and was again updated this year by Schneider and McGrew (click here).

However, the CHC chapter I provide in this blog post, particularly when placed in the context of the Wechsler batteries, provides a solid foundation for understanding CHC theory and its impact on contemporary intelligence test development and interpretation. My goal is to increase awareness of CHC theory and its relevance to psychological assessment and interpretation. My goal is to spur others to become more current re: this now dominant framework in the field of applied IQ testing.


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