NY Times article: America’s children are unwell—Are schools part of the problem?

 https://www.nytimes.com/2025/11/24/magazine/youth-mental-health-crisis-schools.html?unlocked_article_code=1.3k8.SqUT.-iVKFtsi4Lfe&smid=nytcore-ios-share

 Quick email FYI post from iPhone.

The importance of attention for variation in learning to learn —#Gwm #AC #learning

 

Quick email sent blog post.

 

And yet another study demonstrating the central role of attentional control (Gwm-AC as per CHC) in learning.

 

The importance of attention for variation in learning to learn - ScienceDirect 
https://www.sciencedirect.com/science/article/abs/pii/S0749596X25001044

 

"Collectively, these results suggest that individual differences in learning to learn are associated with variation in the ability to manage different aspects of attention during learning as well as motivational and strategic factors."

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
******************************************

 

How is spatial reasoning associated with mathematical ability? Evidence based on a meta-analysis - ScienceDirect

How is spatial reasoning associated with mathematical ability? Evidence based on a meta-analysis - ScienceDirect 
https://www.sciencedirect.com/science/article/abs/pii/S1041608025002146

 

Quick FYI email blog post

 

Abstract

Despite extensive research exploring the relationship between various spatial reasoning and mathematical abilities, there is rare evidence of their integrated effects and relational specificity. Using the meta-analysis method, this study estimated the spatial reasoning-mathematics correlation and analysed the potential moderating effects of spatial reasoning factors (i.e., spatial visualisation, mental rotation, and spatial orientation), mathematical domains (i.e., numerical, arithmetic, geometric, logical reasoning, and comprehensive math), and age (i.e., preschoolers, children, adolescents, and adults). After integrating 62 studies with 239 effect sizes, a moderate correlation (r = 0.31, 95 % CI [0.29, 0.33]) was identified between spatial reasoning and mathematics; spatial visualisation and spatial orientation showed stronger associations with mathematical ability than mental rotation; comprehensive math, geometry and logical reasoning exhibited superior correlations with spatial reasoning than arithmetic. In addition, no relational differences were detected among preschoolers, children, adolescents, and adults. Theoretical and practical implications of these findings are discussed.

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
******************************************

 

Screen Time in Tweens Predicts ADHD, Slower Brain Growth

Quick email-to-blog FYI post

 

Screen Time in Tweens Predicts ADHD, Slower Brain Growth 
https://neurosciencenews.com/screentime-adhd-neurodevelopment-29964/

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
******************************************

Effects of artificial #intelligence (#AI) on #educational functioning: A review and #metaanalysis — #EDPSY #schoolpsychologists #schoolpsychology #cognition

Link to journal

Abstract

 

Burgeoning integration of AI into educational settings could have profound implications for students’ performance. This systematic review and meta-analysis examined the effects of different types of AI and four levels of learning—cognition, knowledge utilization, meta-cognition, and psychological functioning—yielding 228 studies with 464 effect sizes that met criteria for inclusion. AI had large positive effects on cognition, r = 0.530, p < 0.001 [95%CI:0.447 to 0.613] and psychological functioning, r = 0.514, p < 0.001 [95%CI:0.246 to 0.720], moderate effects on knowledge utilization, r = 0.417, p < 0.001 [95%CI:0.305 to 0.747], and small effects on meta-cognition, r = 0.268, p = 0.21 [95%CI:-0.225 to 0.772]. Different types of AI had different effects on cognition, with generative AI demonstrating the largest effects, which were larger than other types of AI (e.g., intelligent tutoring, adaptive/personalized learning). However, different types of AI had comparable moderate effects in bolstering knowledge utilization and psychological functioning. AI had the largest effects on improving learning in arts and humanities. Analyses provided evidence for differential impact of AI on learning across countries with different economic advancement. The findings suggest that AI can be effective at improving learning under certain conditions and that the effectiveness varies with the type of AI.

Effects of Age and Processing Speed on Tilt Are Primarily Linear and Additive, Not Nonlinear and Multiplicative | Published in Intelligence & Cognitive Abilities

Quick email-based blog FYI post.

 

Effects of Age and Processing Speed on Tilt Are Primarily Linear and Additive, Not Nonlinear and Multiplicative | Published in Intelligence & Cognitive Abilities 
https://icajournal.scholasticahq.com/article/146460-effects-of-age-and-processing-speed-on-tilt-are-primarily-linear-and-additive-not-nonlinear-and-multiplicative

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
******************************************

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
******************************************

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
******************************************

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. 

 

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
******************************************

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