Tuesday, November 11, 2025

Cognitive disability might be on the rise in the U.S., particularly among younger adults

FYI quik-email posting to blog.
 
Cognitive disability might be on the rise in the U.S., particularly among younger adults 
https://www.psypost.org/cognitive-disability-might-be-on-the-rise-in-the-u-s-particularly-among-younger-adults/

Pardon typos and spelling errors-Message may be sent from iPhone and I've always had spelling problems :)

*****************************************
Kevin S. McGrew, PhD
Educational & School Psychologist
Director
Institute for Applied Psychometrics (IAP)
https://www.themindhub.com
******************************************

Monday, November 10, 2025

Ignore…yet another 1.2.3 test post to debug a tech problem.

 


Testing 1 2 3 post to debug a problem

 


Individuals with higher working memory are more strategic offloaders but also greater forgetters.

This is a quick email-based FYI post to IQ's Corner.  Click link to visit journal abstract.
 
Individuals with higher working memory are more strategic offloaders but also greater forgetters. 
https://psycnet.apa.org/record/2026-85140-001

Pardon typos and spelling errors-Message may be sent from iPhone and I've always had spelling problems :)

*****************************************
Kevin S. McGrew, PhD
Educational & School Psychologist
Director
Institute for Applied Psychometrics (IAP)
https://www.themindhub.com
******************************************

Sunday, November 09, 2025

The History of the #CHC Theory of #Cognitive Abilities in #Indonesia

Click on images to enlarge








Approximately seven years ago I made a post regarding the launch of the AJT CHC-based intelligence test developed and normed in Indonesia. I was the primary CHC theory and applied psychometrics consultant for the project for four years (2014 to 2017).


Unfortunately the timing of the formal AJT launch was impacted by several unanticipated factors (e.g., the lack of a mature university-based psychological assessment and interpretation training infrastructure), the most salient being the world-wide COVID pandemic.  At that time the AJT folks put the project on “pause”. To date I’ve not heard if the project has since been restarted.


I decided to check on the impact of the CHC theory of cognitive abilities in Indonesia. It was my impression, based on multiple keynote university-based CHC/AJT presentations I made during the project plus feedback from the project staff, that despite the AJT pause, the project had a major impact regarding the infusion of the CHC theory in universities (psychology departments) and private testing entities. 


To satisfy my curiosity, I performed the following Google AI queries. Below is what I I found.  Professionally I feel very proud that the four-year AJT project resulted in the quick infusion of CHC theory in the academic and private sector discourse. All entities and staff who worked on the project should be proud of the CHC impact in Indonesia.

———————————


On 11-09-2025 I, Dr. Kevin McGrew, submitted the following prompt question, followed by a second follow-up question to a Google AI search (that uses the Gemini large language model) with the Firefox web browser (version 144.0.2, released on October 28, 2025).

 

“What is the history of the CHC theory of intelligence in Indonesia?

 

The history of the Cattell-Horn-Carroll (CHC) theory of intelligence in Indonesia is relatively recent, primarily involving efforts to develop and validate locally normed intelligence tests based on the CHC framework. The theory has been recognized as the "most comprehensive theory" for structuring cognitive abilities and has been used in academic research and test development. 

 

Key milestones in the history include:

  • Early 2010s: The CHC theory started gaining attention in Indonesian academic and psychological circles, leading to research interest in applying the framework. The existing intelligence tests in Indonesia at the time were few and not necessarily based on contemporary, comprehensive models like CHC theory.
  • 2013-2018: The AJT Cognitive Assessment Test (AJT-CAT) Project: The most significant development began around 2013, sponsored and directed by the Yayasan Dharma Bermakna Foundation (YDB).
    • This project aimed to create the first comprehensive, individually administered intelligence test in Indonesia that was natively based on the CHC theory.
    • Psychometric and CHC expert Dr. Kevin McGrew served as a consultant for this project.
    • The test was nationally normed using a sample of over 4,000 Indonesian individuals aged 5-18.
    • The formal launch of the AJT occurred in April 2018.
  • Research and Further Test Development: Since the launch of the AJT, the CHC theory has continued to serve as a foundational framework for other, more specific test development efforts.
    • Researchers have developed tests for specific abilities, such as a visual-spatial ability test for high school students and a lexical knowledge test, using the CHC theory as the underlying structural model.
    • These studies emphasize the use of CHC theory to ensure tests are psychometrically sound and relevant for the Indonesian context, particularly for educational and clinical assessment purposes. 

The history of CHC theory in Indonesia is marked by a shift towards developing culturally relevant, psychometrically robust assessments grounded in contemporary, internationally recognized theories of intelligence, moving beyond older or imported models.

 

What psychologist is most associated with the CHC theory in Indonesia?

 

The psychologist most prominently associated with the application and development of the Cattell-Horn-Carroll (CHC) theory in Indonesia is the American psychometric expert Dr. Kevin McGrew.  Dr. McGrew served as the primary international consultant for the development of the AJT Cognitive Assessment Test (AJT-CAT), which was the first individually administered, CHC-theory-based intelligence test developed and nationally normed in Indonesia. This project was a major collaborative effort between 2013 and 2018 involving the Yayasan Dharma Bermakna Foundation (YDB) and the Faculty of Psychology at Universitas Gadjah Mada (UGM). 

 

While the CHC theory in Indonesia involves contributions from several Indonesian researchers and institutions, Dr. McGrew is the most widely recognized figure due to his direct supervision of this foundational project and his broader international reputation as a leading scholar and "gatekeeper" of the CHC theory. 

 


Friday, November 07, 2025

Research Byte: What Explains the Relations Between Reading Comprehension and Written Composition (#CHC #Grw)? Findings from a Longitudinal Study

Click on image to enlarge
 
 
Full article: What Explains the Relations Between Reading Comprehension and Written Composition? Findings from a Longitudinal Study 
https://www.tandfonline.com/doi/full/10.1080/10888438.2025.2582620?src=#d1e329
 
"Confirmatory factor analysis revealed a strong correlation (.82) between reading comprehension and written composition".  Comment:  This finding is consistent with CHC theory where reading and writing skills form a singular broad Grw construct. 
 
This is an open access article that can be downloaded at the link above.
 
 
This post was sent via my quick email-to-blog post method.

Pardon typos and spelling errors-Message may be sent from iPhone and I've always had spelling problems :)

*****************************************
Kevin S. McGrew, PhD
Educational & School Psychologist
Director
Institute for Applied Psychometrics (IAP)
https://www.themindhub.com
******************************************

Higher fluid intelligence is associated with more structured cognitive maps

FYI post sent via my email.  I hope it works.  File under Gf in the CHC model of intelligence.
 
 
 
Higher fluid intelligence is associated with more structured cognitive maps 
https://www.psypost.org/higher-fluid-intelligence-is-associated-with-more-structured-cognitive-maps/

Pardon typos and spelling errors-Message may be sent from iPhone and I've always had spelling problems :)

*****************************************
Kevin S. McGrew, PhD
Educational & School Psychologist
Director
Institute for Applied Psychometrics (IAP)
https://www.themindhub.com
******************************************

Monday, October 27, 2025

Lets hear it for morning Java/expresso!!! - #neurocognitve #brain #cogntion #whitematter #java #coffee #morningjoe #expresso #Gf #flluidintelligence

I’ve only got one addiction I still indulge in.  Double expresso’s (actually a lungo is my preference) in the morning.  Yet another study extolling the value of Java and brain health, this time with brain white matter integrity and cortical thickness.  White matter tracts serve as the brain’s internet backbone or interestate system.  

Long live morning Joe☕️

Maybe I should bring back the IAP Gf fluid intelligence coffee mugs!

Double click to enlarge the images for easier reading



Click here to download PDF if you want to read the article.

Abstract

Despite associations of regular coffee consumption with fewer neurodegenerative disorders,its association with microstructural brain alterations is unclear. To address this, we examined the association of coffee consumption with brain MRI parameters representing vascular brain damage, neurodegeneration, and microstructural integrity in 2316 participants in the population-based Hamburg City Health Study. Cortical thickness and white matter hyperintensity (WMH) load were measured on FLAIR and T1-weighted images. Microstructural white matter integrity was quantified as peak width of skeletonized mean diffusivity (PSMD) on diffusion-weighted MRI. Daily coffee consumption was assessed in five groups (<1 cup, 1–2 cups, 3–4 cups, 5–6 cups, >6 cups). In multiple linear regressions, we examined the association between brain MRI parameters and coffee consumption (reference group <1 cup). After adjustment for covariates, 3–4 cups of daily coffee were associated with lower PSMD (p = 0.028) and higher cortical thickness (p = 0.015) compared to <1 cup. Moreover, 1–2 cups per day was also associated with lower PSMD (p = 0.022). Associations with WMH load or other groups of coffee consumption were not significant (p > 0.05). The findings indicate that regular coffee consumption is positively associated with microstructural white matter integrity and cortical thickness. Further research is necessary to determine longitudinal effects of coffee on brain microstructure.

Keywords: cerebral small vessel disease; coffee consumption; cortical atrophy; diffusion-weighted magnetic resonance imaging; microstructural integrity; neurodegenerative diseases; white matter hyperintensities

Sunday, October 19, 2025

The effect of #processingspeed [#Gs] on academic #fluency in children with #neurodevelopmental disorders - #CHC #WISCV #WJV #intelligence #schoolpsychologists #schoolpsychology #SLD #SLD #SPED #fluency #EDPSY

Click on images to enlarge for easy reading


PDF copy of article can be downloaded here.

Abstract 

Poor processing speed (PS) is frequently observed in individuals with neurodevelopmental disorders. However, mixed findings exist on the predictive validity of such processing speed impairment and the role of working memory (WM). We conducted a retrospective chart review of patients evaluated at a developmental assessment clinic between March 2018 and December 2022. Patients with available data on the Wechsler Intelligence Scale for Children, Fifth Edition (WISC-V) and the Woodcock-Johnson, Fourth Edition, Tests of Achievement (WJ IV ACH) were included (n = 77, 69 % male; Mage = 10.6, SDage = 2.5; FSIQ range = 47–129). We performed a mediation analysis with academic fluency (AF) as the dependent variable, PS as the predictor, WM as the mediator, and academic skills and general intelligence as covariates. Both the direct and indirect effects of PS were significant prior to adding covariates. However, only the direct effect of PS was robust, independent of the effects of academic skills and general intelligence. The indirect effect of PS through WM was insignificant after accounting for the general academic skills and intelligence. Therefore, PS explains a unique variance in AF. This finding suggests that PS may be an exception to the criticism of cognitive profile analysis. Interpreting the PS score as a relative strength or weakness within a cognitive profile may uniquely predict their timed academic performance in youth with neurodevelopmental disorders.

[Do] Humans peak in midlife [?]: A combined #cognitive and #personality trait perspective - #intelligence #developmental #schoolpsychologists #schoolpsychology #CHC


Open access copy of article can be downloaded here.

 Highlights


  • Age trends reviewed across 16 key cognitive and personality-related dimensions.
  • All variables plotted on a common scale to enable direct cross-domain comparisons.
  • Age trajectories varied widely: some traits declined, others improved with age.
  • A weighted composite index of functioning was developed from theory and evidence.
  • Overall cognitive-personality functioning peaks between ages 55 and 60.
Abstract
Fluid intelligence, which peaks near age 20 and declines materially across adulthood, is often regarded as the most critical cognitive ability for predicting important life outcomes. Yet, human achievement in domains such as career success tends to peak much later, typically between the ages of 55 and 60. This discrepancy may reflect the fact that, while fluid intelligence may decline with age, other dimensions improve (e.g., crystallized intelligence, emotional intelligence). To examine this possibility, we analyzed age-related trends across nine constructs associated with life success: cognitive abilities, personality traits, emotional intelligence, financial literacy, moral reasoning, resistance to sunk cost bias, cognitive flexibility, cognitive empathy, and need for cognition. We extracted age-related findings from published studies for each dimension and standardized all scores to T-scores for comparability. We then constructed a Cognitive-Personality Functioning Index (CPFI) and compared two weighting approaches: a Conventional model, emphasizing intelligence and core personality traits, and a Comprehensive model, integrating a broader array of dimensions. Both models revealed a peak in overall functioning during late midlife (ages 55 to 60) but diverged at the younger and older ends of adulthood: under Conventional weighting, older adults scored well below young adults, whereas under Comprehensive weighting, the two groups were roughly equivalent. These findings suggest that functional capacity, defined in terms of key differential psychological traits, may peak in late midlife, closely aligning with the typical peak in career achievement. Also, individuals best suited for high-stakes decision-making roles are unlikely to be younger than 40 or older than 65.

Extremely important (IMHO) #CHC #cognitive #reading achievement #g+specific abilities #SEM paper - #schoolpsychology #schoolpsychologists #SPED #EDPSY #LD #SLD

Extremely interesting (important/intriging) CHC cognitive-reading achievement relations meta-SEM paper.  Why?  Because, as far as I know, it is the first g+specific abilities paper to evaluate a model with causal relations specified within and between cognitive and reading achievement CHC constructs.  Paper info below, as well as open access link to PDF.  Also, this is the first time I’ve seen a meta-structural equation modeling analysis.  Kudos to the authors.

Click on images to enlarge fo easy reading


Abstract

Cognitive tests measure psychological constructs that predict the development of academic skills. Research on cognitive–reading achievement relations has primarily been completed with single-test batteries and samples, resulting in inconsistencies across studies. The current study developed a consensus model of cognitive–reading achievement relations using meta-structural equation modeling (meta-SEM) through a cross-sectional analysis of subtest correlations from English-language norm-referenced tests. The full dataset used for this study included 49,959 correlations across 599 distinct correlation matrices.These included correlations among 1112 subtests extracted from 137 different cognitive and achievement test batteries. The meta-SEM approach allowed for increased sampling of cognitive and academic reading skills measured by various test batteries to better inform the validity of construct relations. The findings were generally consistent with previous research, suggesting that cognitive abilities are important predictors of reading skills and generalize across different test batteries and samples. The findings are also consistent with integrated cognitive–reading models and have implications for assessment and intervention frameworks.

Keywords: cognitive abilities; reading skills; cognitive–achievement relations; CHC theory;meta-structural equation modeling


Thursday, October 16, 2025

IQs Corner pub alert: CHC theory of cognitive abilities used to define and evaluate AI - #AI #CHC #intelligence #schoolpsychology #schoolpsychologists #IQ #EDPSY

An exciting new paper from the Dan Hendryks et al. at the Center for AI Safety  The center is  a nonprofit with the mission “to reduce societal-scale risks from artificial intelligence.”  In this just released paper, they propose a modified CHC theory definition/framework for evaluating AI: 
  • AGI is an AI that can match or exceed the cognitive versatility and proficiency of a well-educated adult.”
Given my extensive research and publications regarding the Cattell-Horn-Carroll (CHC) theory of cognitive abilities, I was pleasantly surprised when Dan reached out for my comments and suggested revisions to the paper.  

I was extremely impressed as Dan and his group had been involved in a deep dive in the CHC literature and had developed, without my involvement, an ingenuous internet-based CHC set of “test” items that can be submitted to different AI agents (GPT-4, GPT-5, Grok) to assess their CHC broad ability domain performance (to evaluate the extent to which AI agents demonstrate the “cognitive versatility and proficiency of a well-educated adult”).  I had zero involvement in the conceptualization or development of the AI modified/adapted CHC assessment framework and resulting CHC AI metrics. 

I want to express my appreciation to Dan for including me among the list of over 24 authors.  I’m very excited to monitor future developments by Dan and his group, as well as to see the impact of the CHC theory model on AI.

Links to secure copies of the paper (in various formats and social media platforms) are listed at the bottom of this post.  

Note.  Click on all images to enlarge for easy reading

Abstract

The lack of a concrete definition for Artificial General Intelligence (AGI) obscures the gap between today's specialized AI and human-level cognition. This paper introduces a quantifiable framework to address this, defining AGI as matching the cognitive versatility and proficiency of a well-educated adult. To operationalize this, we ground our methodology in Cattell-Horn-Carroll theory, the most em-pirically validated model of human cognition. The framework dissects general intelligence into ten core cognitive domains—including reasoning, memory, and perception—and adapts established human psychometric batteries to evaluate AI systems. Application of this framework reveals a highly “jagged” cognitive profile in contemporary models. While proficient in knowledge-intensive domains, current AI systems have critical deficits in foundational cognitive machinery, particularly long-term memory storage. The resulting AGI scores (e.g., GPT-4 at 27%, GPT-5 at 58%) concretely quantify both rapid progress and the substantial gap remaining before AGI.

Modified CHC model for evaluating AI agents

Click on image to enlarge.


As mentioned in the abstract, the paper reports on the CHC AGI capabilities of GPT-4 and GPT-5 in the following figure.  Click on images to enlarge.


I was pleased to see (on page 14 of the PDF paper) the following “intelligence as processor” figure which is based on work by myself and Joel Schneider. The model in Figure 3 (below) is based on Kevin S. McGrew and W. Joel Schneider. CHC theory revised: A visual-graphic summary of Schneider and McGrew's 2018 CHC update chapter. MindHub / IAPsych working paper, 2018.  http://www.iapsych.com/mindhubpub4.pdf 

The Schneider & McGrew (2018) heuristic CHC information processing model is below the Figure 3 figure.  Click on images to enlarge.




Dan Hendrycks and the Center AI Safety provide brief overviews describing this work on LinkedIn as well as Twitter/X (both that can be monitored for comments).

A PDF copy of the paper can be downloaded here.  A clickable web-based version of the paper can be accessed here.

Exciting stuff !!

Wednesday, October 15, 2025

IQs Corner: AI and the Future of Skills, Volume 1, Capabilites and Assessments - #AI #intelligence #CHC #schoolpsychology #schoolpsychologists #education


Although a four-year old publication may seem like a long time in the AI literature, readers interested in the potential interface of AI and human cognitive abilities theory and research, should take a look at this lengthy OECD report which is available free for download here

Of course, given my research and interests, I found Chapter 3 (of 20) of particular interest.

Right click on images to enlarge



Wednesday, October 08, 2025

IQs Corner. Comfortable fictions—The myth of #Gardner’s #multipleintelligences and other #educational fads (e.g., #learningstyles) - #schoolpsychology #schoolpsychologists #education #pseudoscience #intelligence

A thought provoking take at the Learning Dispatch (substack) re Gardner’s theory of multiple intelligences and other educational theories (e.g., learning styles) that appeal to comfortable fictions that “describe the reassuring stories societies tell to preserve moral comfort in the face of contradiction….these narratives about history, identity, and progress allow dominant groups to evade the moral costs of their own actions.



Monday, September 29, 2025

What does #ElonMusks #Grok (#xAI) think of Dr. Kevin #McGrew ? - My Grok-based professional bio


I’ve finally started to play around with different AI programs.  I’ve been taking topics where I know the extant research well (e.g., CHC theory of intelligence, the WJ series of tests) and asking AI agents to summarize the information.  Today I had the idea of asking Grok to write me a professional bio.  After all, I know more about me than I do any other topic.  Below is the result.  I’ve made edits (strikethroughs) and added text (red font) to make it more accurate. 

I can now see how this technology can help save time with certain tasks. The bio is relatively accurate for a rough draft, but it did need some revisions and notable additions (here-and-there) to be more accurate and thorough.  I’ve included a link to my formally posted bio for comparison purposes—yes, it is long as it is my “long” form bio I submit along with my CV when engaged in court/legal work.  

The Grok bio does not include URL links to material.  Perhaps there is a way to ask Grok to include links, but I don’t know if that is possible at this point.  My guess is that it probably can.  If you want to see more information on any topic, just go the theMindHub.com and navigate accordingly.

I did notice that during the 2+ minutes of Grok work, it spent a significant amount of time on my professional web page.  I guess this means that if you want an AI tool to write your professional bio, you must have some decent content up on the web…it can’t make up material from thin air.  Also, it would appear good at providing rough drafts that still requires a content expert to revise accordingly.

All in all, an interesting excercise.

Dr. Kevin S. McGrew bio written by AI program Grok (xAI) on 09-29-25

(strikethrough and edits in red font)

Can be compared to Dr. McGrew’s formal bio posted at theMindHub.com

 

Dr. Kevin S. McGrew is a prominent educational psychologist and psychometrician whose career spans over five decades, beginning as a practicing school psychologist for 12 years (1975–1989) after earning his MS in School Psychology from Minnesota State University Moorhead. He later obtained a PhD in Educational Psychology (Special Education) from the University of Minnesota in 1989, focusing on research methods and applied psychometrics. McGrew has held academic roles such as Professor of Applied Psychology at St. Cloud State University (1990–2000) and Visiting Lecturer and Adjunct Research Professor at the University of Minnesota (2000–2024). He also served as Research Director for the Woodcock-Muñoz Foundation (2005-2014), Associate Director for Measurement Learning Consultants (2008-2014), and Director of the Institute for Applied Psychometrics (1998-current). His work has profoundly shaped the fields of human intelligence theory and testing, emphasizing empirical rigor, practical application in education and law, and integration of cognitive and non-cognitive factors.

Contributions to Intelligence Theory

McGrew is widely recognized as a leading scholar in the Cattell-Horn-Carroll (CHC) theory of cognitive abilities, a comprehensive psychometric framework that integrates fluid and crystallized intelligence (Cattell-Horn) with Carroll’s three-stratum model. Alongside Dr. Joel Schneider, he has served as an unofficial “gatekeeper” of CHC theory, authoring seminal updates and cross-battery interpretations that have made it the dominant model in contemporary intelligence research, test development, and and interpretation of intellectual assessment results.  His efforts have advanced CHC from a theoretical construct model to a practical tool for diagnosing learning disabilities, intellectual giftedness, and intellectual disabilities, influencing guidelines in the American Association on Intellectual and Developmental Disabilities (AAIDD) manual (2021). 

McGrew has also pioneered integrative models that extend beyond pure cognition. He developed the Model of Academic Competence and Motivation (MACM) in the early 2000s, which posits that academic success arises from the interplay of cognitive abilities, conative (motivational) factors self-efficacy, achievement orientations, self-beliefs, self-regulated learning, and affective elements such as personality and social-emotional skills, interest and anxiety.  This evolved into the broader Cognitive-Affective-Motivation Model of Learning (CAMML), emphasizing how these dimensions interact to predict school achievement and inform interventions.  His research on psychometric network analysis has further refined CHC by modeling complex interrelationships among CHC abilities “beyond g” (general intelligence), as highlighted in his 2023 co-authored paper, named the Journal of Intelligence’s “Best Paper” of the year.  McGrew has explored the Flynn effect (rising IQ scores over time) and its implications for the interpretation of intelligence test scores in Atkins intellectual disability death penalty cases. theory, as well as CHC’s links to adaptive behavior and neurotechnology applications for cognitive enhancement.

Contributions to Intelligence Testing

McGrew’s practical impact is most evident in intelligence test development and interpretation, where he championed “intelligent testing”—an art-and-science approach inspired by Alan Kaufman that prioritizes the interpretation of broad CHC composite scores profile analysis over single or global IQ scores.  As primary measurement consultant for the Woodcock-Johnson Psychoeducational Battery—Revised (WJ-R, 1991), he authored its technical manual and conducted statistical analyses for restandardization.  The WJ-R battery was the first major battery of individually administered cognitive and achievement tests based on the first integration of the psychometric intelligence research of Raymond Cattell and John Horn (aka, the Cattell-Horn Gf-Gc model of intelligence) and John Carroll’s seminal (1993) three-stratum model of intelligence.  He co-authored the Woodcock-Johnson III (WJ III, 2001) and Woodcock-Johnson IV (WJ IV, 2014), which were the first major batteries explicitly grounded in CHC theory, introducing subtests for underrepresented abilities like auditory processing and long-term retrieval.  As senior co-author, he led the development of the digitally administered Woodcock-Johnson V (WJ V, 2025), incorporating recent advances in CHC theory and psychometric network analysis and conative measures

Internationally, McGrew consulted on the Indonesian AJT Cognitive Assessment (2014–2017), creating the world’s first CHC-based individually administered intelligence test in that country.  He and advised the Ayrton Senna Institute on large-scale cognitive assessments in Brazil (2016–2025) and contributed to ASI research focused on integrating constructs from McGrew’s CAMML model with the ASI Big-5 personality based social-emotional skill model.  He has provided expert psychometric testimony (through written declarations and/or court testimony) in over 50 Atkins v. Virginia death penalty cases since 2009 and has contributed to refining intellectual disability criteria through CHC lenses. 

Publications and Knowledge Dissemination

McGrew has authored or co-authored over 100 peer-reviewed journal articles, book chapters, and eight norm-referenced test batteries, alongside four books on intelligence test interpretation, including Clinical Interpretation of the Woodcock-Johnson Tests of Cognitive Ability (1997, revised 2005).  His prolific output includes contributions to the APA Handbook of Intellectual and Developmental Disabilities (2021) and critiques of intellectual disability diagnostics.  He maintains influential blogs like IQ’s Corner (www.iqscorner.com), which has synthesized CHC and intelligence theory and related assessment research for practitioners since 2004, and engages on platforms like X (@iqmobile), LinkedIn, and BlueSky (@iqmcgrew.bsky.social) to democratize complex psychometric concepts and share research and insights based on his multiple areas of expertise

Awards and Legacy

McGrew’s influence is underscored by prestigious honors, including the University of Minnesota Distinguished Alumni Award (2016), Minnesota School Psychologists Association Lifetime Achievement Award (2015), Alan S. Kaufman Excellence in Assessment Award (2023), and the Dr. Richard W. Woodcock Award for Innovations in Ability Testing (2025).  His work has bridged theory and practice, empowering educators, clinicians, and policymakers to use intelligence assessments more equitably and effectively, while advocating for a holistic view of human potential that includes motivation and self-regulation alongside cognition.