Within the past few years, courts have been more open to accepting evidence of psychological research. For instance, in 2002, the United States Supreme Court, citing an American Psychological Association (APA) Amicus brief, declared that the execution of mentally retarded individuals was unconstitutional because it violated the Eighth Amendment prohibition against cruel and unusual punishment. Between 2005 and 2012, the Supreme Court accepted APA briefs describing the limitations in neural development of adolescents and its relevance to sentencing. In 2013, the Court ruled that in assessing an individual's intelligence there must be a consideration of the standard error of measurement. All of this suggested a progressive movement in judicial recognition of psychological research. However, during the same time, many courts were allowing and accepting testimony in capital sentencing cases of so-called ethnic adjustment. Some psychologists were testifying that defendants who were from ethnic minority groups had IQ scores that were suppressed and that therefore their scores had to be "adjusted" upward to compensate for the suppression. However, these adjustments were based purely on clinical judgment and did not reflect any empirical studies. As a result, several of these individuals who had their IQ scores adjusted have been executed. This article will describe the case law surrounding this concept, ethical issues that it raises, and how a practitioner can provide useful consultation to attorneys who represent defendants in such cases. (PsycINFO Database Record (c) 2019 APA, all rights reserved)
Thursday, November 28, 2019
Ethnic adjustment abuses in forensic assessment of intellectual abilities. - PsycNET
Within the past few years, courts have been more open to accepting evidence of psychological research. For instance, in 2002, the United States Supreme Court, citing an American Psychological Association (APA) Amicus brief, declared that the execution of mentally retarded individuals was unconstitutional because it violated the Eighth Amendment prohibition against cruel and unusual punishment. Between 2005 and 2012, the Supreme Court accepted APA briefs describing the limitations in neural development of adolescents and its relevance to sentencing. In 2013, the Court ruled that in assessing an individual's intelligence there must be a consideration of the standard error of measurement. All of this suggested a progressive movement in judicial recognition of psychological research. However, during the same time, many courts were allowing and accepting testimony in capital sentencing cases of so-called ethnic adjustment. Some psychologists were testifying that defendants who were from ethnic minority groups had IQ scores that were suppressed and that therefore their scores had to be "adjusted" upward to compensate for the suppression. However, these adjustments were based purely on clinical judgment and did not reflect any empirical studies. As a result, several of these individuals who had their IQ scores adjusted have been executed. This article will describe the case law surrounding this concept, ethical issues that it raises, and how a practitioner can provide useful consultation to attorneys who represent defendants in such cases. (PsycINFO Database Record (c) 2019 APA, all rights reserved)
Tuesday, November 26, 2019
Evaluating the Relation Between CHC Cognitive Factors and Selected Components of Executive Functioning | SpringerLink
Executive functioning remains an elusive paradigm in regard to their underlying constructs. The Cattell-Horn-Carroll (CHC) theory of cognitive functions is the predominant theory of the measurement of human intelligence in psychology in regard to test construction and interpretation. The purpose of this study was to evaluate the relations between components of the Tower Test and Color-Word Interference Test from the Delis-Kaplan Executive Function System (D-KEFS) and CHC theory, as measured by the Woodcock-Johnson III Tests of Cognitive Abilities (WJ-III-COG). Participants were 64 undergraduate students (women, n = 38; men, n = 26), with a mean age of 19.88 years. Results of a Structured Equation Model indicated a correlation between the two factors modeled for Intelligence and Executive functioning was estimated to be 0.575 (0.331), and was statistically significant (p < .001), with a 95% credible interval of (0.551, 0.599). Thus, approximately 33% of the variance for measures of Intelligence was accounted for by measures of Executive Functioning; the biggest CHC contributor was Numbers Reversed which argues for the importance of attention and working memory being an important component of executive functioning. The results suggest that despite a relation between some components of executive function and cognitive ability, much variance between the D-KEFS and WJ-III-COG remains unaccounted for. These findings have implications for evaluation and intervention planning within vocational and educational settings.
Keywords
Neuropsychology Neuropsychological assessment Executive functioning Intelligence CHCTuesday, November 19, 2019
Saturday, November 09, 2019
Individual Differences in the Neurobiology of Fluid Intelligence Predict Responsiveness to Training: Evidence from a Comprehensive Cognitive, Mindfulness Meditation, and Aerobic Exercise Intervention - ScienceDirect
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Kevin McGrew, PhD
Educational Psychologist
Director, Institute for Applied Psychometrics
IAP
www.themindhub.com
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Article: Researchers say a wandering mind may be important to setting goals, making discoveries, and living a balanced life.
Friday, November 08, 2019
Article: Intelligence and educational achievement
Thursday, November 07, 2019
Individual differences in learning efficiency
Thursday, October 17, 2019
Article: Working memory capacity and strategy use on the RAPM
Article: Slower Growth in Working Memory Linked to Teen Car Crashes
Monday, October 07, 2019
Article: The Hype Cycle of Working Memory Training - Thomas S. Redick, 2019
Saturday, September 21, 2019
All you need is g? Predicting piano skill acquisition in beginners: The role of general intelligence, music aptitude, and mindset
Wednesday, September 18, 2019
Frontiers | Comparing the Effects of Rhythm-Based Music Training and Pitch-Based Music Training on Executive Functions in Preschoolers | Frontiers in Integrative Neuroscience
******************************************************
Kevin McGrew, PhD
Educational Psychologist
Director, Institute for Applied Psychometrics
IAP
www.themindhub.com
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New Perspective on Cerebellar Function – Implications for Mental Health
New Perspective on Cerebellar Function – Implications for Mental Health
https://www.newperspectivesoncerebellarfunction.com/
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Tuesday, September 17, 2019
Digit Span Subscale Scores May Be Insufficiently Reliable for Clinical Interpretation: Distinguishing Between Stratified Coefficient Alpha and Omega Hierarchical - Gilles E. Gignac, Matthew R. Reynolds, Kristof Kovacs, 2019
Digit Span Subscale Scores May Be Insufficiently Reliable for Clinical Interpretation: Distinguishing Between Stratified Coefficient Alpha and Omega Hierarchical - Gilles E. Gignac, Matthew R. Reynolds, Kristof Kovacs, 2019
https://journals.sagepub.com/doi/full/10.1177/1073191117748396
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Saturday, September 14, 2019
Sunday, September 08, 2019
Saturday, September 07, 2019
Status of Dr. Kevin McGrew: "I'm back!!"
As many of my readers may (or may not) know, this past winter I was critically ill for 82 days. As a result, I was unable to respond to many questions or requests. But...I have been on the mend since the middle of February and am again at full steam.
Why am I sharing? Well....apparently the word spread that I had either expired or had retired. This is far from the truth. I am back doing my project work, research, and engaging in consultations. Thanks to all who provided support during my illness.
The brain’s default network: updated anatomy, physiology and evo

The brain's default network: updated anatomy, physiology and evo
https://www.nature.com/articles/s41583-019-0212-7
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Tuesday, September 03, 2019
Olfactory dysfunction in the pathophysiological continuum of dementia - ScienceDirect
https://www.sciencedirect.com/science/article/pii/S1568163719301795
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