Intellectual Competence & the Death Penalty

An attempt to provide understandable and up-to-date information regarding intelligence testing, intelligence theories, personal competence, adaptive behavior and intellectual disability (mental retardation) as they relate to death penalty (capital punishment) issues. A particular focus will be on psychological measurement, statistical and psychometric issues.

Saturday, April 5, 2025

Reevaluating the Flynn effect, and the reversal: Temporal trends and measurement invariance in Norwegian armed forces intelligence scores

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Reevaluating the Flynn effect, and the reversal: Temporal trends and measurement invariance in Norwegian armed forces intelligence scores Op...
Tuesday, November 26, 2024

#Intellectual #disability (#ID) and adjudicative #competence evaluations: A detailed review of an often-overlooked population.

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Intellectual disability and adjudicative competence evaluations: A detailed review of an often-overlooked population.  https://psycnet...
Saturday, November 16, 2024

Wait, Where’s the Flynn Effect on the WAIS-V?

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  Emily L. Winter,   Sierra M. Trudel,  Alan S. Kaufman J. Intell.   2024 ,   12 (11), 118;   https://doi.org/10.3390/jintelligence12110118 ...
Tuesday, June 27, 2023

Generational intelligence tests score changes in Spain: Are we asking the right question? - ScienceDirect

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 Generational intelligence tests score changes in Spain: Are we asking the right question? - ScienceDirect  https://www.sciencedirect.co...
Wednesday, May 10, 2023

Inmate convicted in 1981 Memphis murder moved off death row

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Inmate convicted in 1981 Memphis murder moved off death row https://wreg.com/news/investigations/shelby-county-inmate-moves-off-death-row/...
Friday, March 3, 2023

Looking for Flynn effects in a recent online U.S. adult sample: Examining shifts within the SAPA Project - ScienceDirect

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 Looking for Flynn effects in a recent online U.S. adult sample: Examining shifts within the SAPA Project - ScienceDirect  https://www.s...
Tuesday, February 21, 2023

Reframing the clouded scientific spectacles of the Flynn effect: A view through two lenses - ScienceDirect

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 Reframing the clouded scientific spectacles of the Flynn effect: A view through two lenses - ScienceDirect  https://www.sciencedirect.c...
Tuesday, January 17, 2023

Law and psychology must think critically about effect sizes | SpringerLink

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 Law and psychology must think critically about effect sizes | SpringerLink  https://link.springer.com/article/10.1007/s44202-022-00062-...
Monday, December 19, 2022

Psychological Testing in Forensic Contexts Conducted Remotely | Journal of the American Academy of Psychiatry and the Law

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 Psychological Testing in Forensic Contexts Conducted Remotely | Journal of the American Academy of Psychiatry and the Law  https://jaap...
Thursday, December 1, 2022

Ongoing trends of human intelligence - ScienceDirect

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 Ongoing trends of human intelligence - ScienceDirect  https://www.sciencedirect.com/science/article/abs/pii/S0160289622000897?via%3Dihu...
Tuesday, November 15, 2022

Domain-specificity of Flynn effects in the CHC-model: Stratum II test score changes in Germanophone samples (1996–2018) - ScienceDirect

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 Domain-specificity of Flynn effects in the CHC-model: Stratum II test score changes in Germanophone samples (1996–2018) - ScienceDirect  ...
Tuesday, November 1, 2022

Following up after Moore and Hall: A national survey of state legislation defining intellectual disability. - PsycNET

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 Following up after Moore and Hall: A national survey of state legislation defining intellectual disability. - PsycNET  https://psycnet....
Friday, October 28, 2022

Assessment: The power and potential of psychological testing, educational measurement, and program evaluation around the world. - PsycNET

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 Assessment: The power and potential of psychological testing, educational measurement, and program evaluation around the world. - PsycNET...
Friday, September 2, 2022

Neurodevelopmental Disorders, Criminality, and Criminal Responsibility | Journal of the American Academy of Psychiatry and the Law

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 Neurodevelopmental Disorders, Criminality, and Criminal Responsibility | Journal of the American Academy of Psychiatry and the Law  htt...
Monday, August 29, 2022

J. Intell. | Special Issue : Assessment of Human Intelligence—State of the Art in the 2020s

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J. Intell. | Special Issue : Assessment of Human Intelligence—State of the Art in the 2020s https://www.mdpi.com/journal/jintelligence/spe...
Thursday, February 3, 2022

Law Review Article: Broderick (2022). Executing defendents with intellectual disabilities: Unconstitutional in theory, persistent in practice

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Abstract:   In 2002, in Atkins v. Virginia , the Supreme Court abolished the death penalty for defendants with intellectual disabilities....
Thursday, January 27, 2022

J. Intell. | Free Full-Text | Linguistic Influences on Cognitive Test Performance: Examinee Characteristics Are More Important than Test Characteristics

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J. Intell. | Free Full-Text | Linguistic Influences on Cognitive Test Performance: Examinee Characteristics Are More Important than Test Cha...
Tuesday, January 4, 2022

SCOTUS to hear Georgia’s Atkins ID death penalty “beyond reasonabledoubt” law

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https://www.nytimes.com/2022/01/03/us/politics/supreme-court-death-penalty-intellectual-disability.html?referringSource=articleShare ...
Monday, December 13, 2021

The secular trend of intelligence test scores: The Danish experience for young men born between 1940 and 2000

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 The secular trend of intelligence test scores: The Danish experience for young men born between 1940 and 2000  https://journals.plos.or...
Tuesday, December 7, 2021

Greenspan & Brown (2021) on FASD as per AAIDD and DSM-5-TR approaches

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Double click on image to enlarge ****************************************** Kevin S. McGrew, PhD Educational & School Psycho...
Saturday, November 13, 2021

Genetically informed, multilevel analysis of the Flynn Effect across four decades and three WISC versions - Giangrande - - Child Development - Wiley Online Library

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https://srcd.onlinelibrary.wiley.com/doi/10.1111/cdev.13675 Abstract This study investigated the systematic rise in cognitive ability ...
Wednesday, October 20, 2021

Intellectually Disabled Alabama Death-Row Prisoner Appeals Denial of Stay of Execution, Arguing Designation of Lethal Injection Violated Americans With Disabilities Act https://deathpenaltyinfo.org/news/intellectually-disabled-alabama-death-row-prisoner-appeals-denial-of-stay-of-execution-arguing-designation-of-lethal-injection-violated-americans-with-disabilities-act

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Intellectually Disabled Alabama Death-Row Prisoner Appeals Denial of Stay of Execution, Arguing Designation of Lethal Injection Violated Ame...

Pervis Payne (an Atkins case) Seeks Hearing on Whether Shelby County Prosecutors Should be Recused From His Case Based on Trial Prosecutor’s Possible Conflict of Interest https://deathpenaltyinfo.org/news/pervis-payne-seeks-hearing-on-whether-shelby-county-prosecutors-should-be-recused-from-his-case-based-on-trial-prosecutors-possible-conflict-of-interest

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Pervis Payne Seeks Hearing on Whether Shelby County Prosecutors Should be Recused From His Case Based on Trial Prosecutor's Possible Con...
Sunday, October 3, 2021

‘Race-norming’ kept former NFL players from dementia diagnoses. Their families want answers.

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 'Race-norming' kept former NFL players from dementia diagnoses. Their families want answers.  https://www.washingtonpost.com/sp...
Monday, September 6, 2021

Professional Pitfalls in Malingering Determinations | Journal of the American Academy of Psychiatry and the Law

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Professional Pitfalls in Malingering Determinations | Journal of the American Academy of Psychiatry and the Law http://jaapl.org/content/4...
Thursday, September 2, 2021

Ernest Johnson eligible for death penalty, Missouri Supreme Court says

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https://themissouritimes.com/ernest-johnson-eligible-for-death-penalty-missouri-supreme-court-says/ **********************************...
Friday, August 27, 2021

Forensic evaluators’ opinions on the use of videoconferencing technology for competency to stand trial evaluations after the onset of COVID-19. - PsycNET

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 Forensic evaluators' opinions on the use of videoconferencing technology for competency to stand trial evaluations after the onset of...
Wednesday, August 4, 2021

Discontinuing the Flynn effect reference archive project.

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Due to the lack of use of this resource by others, and time constraints on the blog master, the Flynn effect reference archive project is no...
Sunday, June 20, 2021

Flynn effect reference project: 06-21-21

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I had previously maintained a "Flynn effect archive" project at this blog.  In its prior form, it included a reference list and...

'No Defendant Has Ever Met This Burden': Inside Georgia's Death Sentence Ruling

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Opinion enclosed. Best. -E. www.law.com/daily...uling/ 'No Defendant Has Ever Met This Burden': Inside Georgia's Death Sentenc...
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Kevin McGrew
Dr. Kevin McGrew is Director of the Institute for Applied Psychometrics (llc). Additional information, including potential conflicts of interest resulting from commercial test development or other consultation, can be found at The MindHub(TM; http://www.themindhub.com ). General email contact is iqmcgrew@gmail.com
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