Why Daily Sudoku Solvers Score Higher on Fluid Reasoning IQ Subtests
Angela L. Duckworth
Angela L. Duckworth

13 July, 2026

Why Daily Sudoku Solvers Score Higher on Fluid Reasoning IQ Subtests

When Maya Patel, a 42‑year‑old financial analyst in Chicago, finished her morning cup of coffee, she spent the next ten minutes filling in a medium‑difficulty Sudoku grid. Two weeks later, a colleague remarked that Maya seemed to “solve” the logic puzzles on the new WAIS‑IV fluid‑reasoning […]
Why Women’s Verbal IQ Scores Fluctuate Across Their Menstrual Cycle
Angela L. Duckworth
Angela L. Duckworth

10 July, 2026

Why Women’s Verbal IQ Scores Fluctuate Across Their Menstrual Cycle

When Maya, a 28‑year‑old doctoral candidate in linguistics, took the verbal portion of the WAIS‑IV twice within a single month, her scores swung by 12 points—13 on a test administered on day 7 of her cycle and 25 on day 21. The difference was enough to shift her from the 45th percentile to the […]
Why the Color Temperature of Your Study Light Affects IQ Test Scores
Angela L. Duckworth
Angela L. Duckworth

10 July, 2026

Why the Color Temperature of Your Study Light Affects IQ Test Scores

When Maya Nguyen sat down for a timed practice IQ test in her university’s study lounge, the overhead fluorescents hummed a steady 4,000 K. Two weeks later, she repeated the same test in a dorm room bathed in 2,700 K LED bulbs. Her score on the matrix‑reasoning subtest jumped from 28 to 32, […]
Why Marathon Runners Often Outperform on Verbal IQ Subtests: Unraveling the Endurance‑Cognition Connection
Angela L. Duckworth
Angela L. Duckworth

24 June, 2026

Why Marathon Runners Often Outperform on Verbal IQ Subtests: Unraveling the Endurance‑Cognition Connection

When elite marathoner Eliud Kipchoge laced up for his 2023 “Breaking2” attempt, the world watched his stride, not his speech. Yet, a post‑race interview revealed something unexpected: Kipchoge effortlessly quoted passages from Shakespeare and recited complex scientific concepts while discussing […]
Why Chess Grandmasters Outperform on Spatial IQ Tests—but Not Verbal Ones
Angela L. Duckworth
Angela L. Duckworth

23 June, 2026

Why Chess Grandmasters Outperform on Spatial IQ Tests—but Not Verbal Ones

When Grandmaster Magnus Carlsen stared at a blank 8×8 board during a televised exhibition in Reykjavik, he was not merely visualizing the next move; he was rehearsing a cascade of spatial transformations that, according to a 2018 study at the University of Oslo, map directly onto the neural […]
Inside the Mind of a Prodigy: How Early Cognitive Development Shapes IQ Trajectories
Angela L. Duckworth
Angela L. Duckworth

11 May, 2026

Inside the Mind of a Prodigy: How Early Cognitive Development Shapes IQ Trajectories

When he was just three years old, Jacob Barnett, an American child prodigy, began solving 5,000-piece puzzles, and by the age of 10, he was attending college-level quantum physics courses. Barnett's extraordinary intellectual journey isn't just a tale of singular talent; it offers a window into […]
How Seasonal Changes Affect Cognitive Performance and IQ Test Results
Angela L. Duckworth
Angela L. Duckworth

04 May, 2026

How Seasonal Changes Affect Cognitive Performance and IQ Test Results

On a crisp October morning in 2012, researchers at the University of Liège in Belgium uncovered an intriguing pattern: cognitive performance varied with the seasons. Their study, published in the journal Proceedings of the National Academy of Sciences, tracked the brain activity of participants […]
How Puzzle-Solving Styles Can Predict IQ Test Success
Angela L. Duckworth
Angela L. Duckworth

27 April, 2026

How Puzzle-Solving Styles Can Predict IQ Test Success

In 2003, a study led by researchers at the University of Toronto revealed that individuals who excel at solving jigsaw puzzles often employ spatial visualization strategies that correlate with higher IQ scores. This intriguing finding has sparked ongoing interest in the relationship between […]
How Childhood Trauma Could Skew Adult IQ Test Results
Angela L. Duckworth
Angela L. Duckworth

20 April, 2026

How Childhood Trauma Could Skew Adult IQ Test Results

When Melissa entered the room for her IQ test, she felt a flood of emotions that had nothing to do with logic puzzles or verbal reasoning. For Melissa, who grew up in a turbulent household where emotional and physical neglect were frequent, the sterile testing environment triggered a cascade of […]
How Urban Living Shapes Cognitive Patterns: The City vs. Countryside IQ Debate
Angela L. Duckworth
Angela L. Duckworth

13 April, 2026

How Urban Living Shapes Cognitive Patterns: The City vs. Countryside IQ Debate

Imagine walking through the bustling streets of Tokyo, where neon lights blur into a vibrant tapestry of culture, technology, and ambition. Contrast this with a serene walk through the English countryside, where the horizon stretches endlessly, and the only sounds are the rustling leaves and […]
How Video Game Skills Translate to IQ Test Performance
Angela L. Duckworth
Angela L. Duckworth

06 April, 2026

How Video Game Skills Translate to IQ Test Performance

In 2015, neuroscientists at the University of California, Irvine, conducted a study that startled educators and parents alike: they found that regular players of action video games scored higher in areas associated with cognitive functions, such as perception, attention, and decision-making. […]
How Microdosing Psychedelics Could Influence IQ and Cognitive Flexibility
Angela L. Duckworth
Angela L. Duckworth

30 March, 2026

How Microdosing Psychedelics Could Influence IQ and Cognitive Flexibility

On a crisp autumn morning in 2018, a Silicon Valley software engineer, whom we'll call Alex, meticulously placed a minuscule 10-microgram tab of LSD under his tongue. Alex wasn’t seeking a psychedelic trip; he was microdosing. The aim? To enhance his cognitive performance and creativity without […]
Why Left-Handed People Perform Differently on IQ Tests
Angela L. Duckworth
Angela L. Duckworth

23 March, 2026

Why Left-Handed People Perform Differently on IQ Tests

In 2006, a study published in the journal Brain and Language found that left-handed individuals were more likely to have a broader corpus callosum, the part of the brain that connects the two hemispheres. This anatomical difference has been linked to an increased ability to process information […]
How Personality Traits Influence Your IQ Test Results
Angela L. Duckworth
Angela L. Duckworth

16 March, 2026

How Personality Traits Influence Your IQ Test Results

During a study at the University of Pennsylvania in 2018, researchers found that participants with high levels of openness scored an average of 10% higher on IQ tests compared to their less open counterparts. This discovery sheds light on the nuanced relationship between personality traits and […]
Why People with Synesthesia Often Score Higher on IQ Tests
Angela L. Duckworth
Angela L. Duckworth

09 March, 2026

Why People with Synesthesia Often Score Higher on IQ Tests

Imagine hearing a symphony and simultaneously seeing a cascade of colors dance before your eyes. For some, this is not the result of an overactive imagination but a daily reality. Synesthesia, a condition where one sensory experience involuntarily triggers another, offers a unique lens into […]
Why Virtual Reality Experiences Could Boost Your IQ
Angela L. Duckworth
Angela L. Duckworth

07 March, 2026

Why Virtual Reality Experiences Could Boost Your IQ

A 2020 experiment conducted by Stanford University revealed that participants engaging with virtual reality (VR) had significant increases in spatial awareness and memory retention compared to those using traditional two-dimensional learning tools. The immersive nature of VR environments offers […]
How Mindfulness Practices Influence IQ and Cognitive Performance
Angela L. Duckworth
Angela L. Duckworth

28 February, 2026

How Mindfulness Practices Influence IQ and Cognitive Performance

In 1996, a groundbreaking study by Dr. Jon Kabat-Zinn at the University of Massachusetts Medical Center introduced the world to the concept of Mindfulness-Based Stress Reduction (MBSR). Initially intended to alleviate chronic pain, MBSR soon revealed benefits that extended beyond physical […]
How Cultural Factors Influence IQ Test Performance
Angela L. Duckworth
Angela L. Duckworth

21 February, 2026

How Cultural Factors Influence IQ Test Performance

In 1972, a groundbreaking study conducted by psychologist John Berry at Queen’s University, Ontario, revealed a startling insight into the role of culture in shaping cognitive assessments. Berry's research found that indigenous Temne farmers in Sierra Leone scored significantly lower on […]
The Relationship Between Stress Levels and IQ Test Performance
Angela L. Duckworth
Angela L. Duckworth

14 February, 2026

The Relationship Between Stress Levels and IQ Test Performance

In the bustling city of Tokyo, a group of university students participated in a study that seemed to defy logic. Conducted by Dr. Hiroshi Shimizu in 2020, the research aimed to explore how stress, a ubiquitous companion in our fast-paced lives, influences something as seemingly static as IQ test […]
The Impact of Bilingualism on IQ and Cognitive Development
Angela L. Duckworth
Angela L. Duckworth

07 February, 2026

The Impact of Bilingualism on IQ and Cognitive Development

Maria, a 30-year-old software engineer from Barcelona, effortlessly switches between Spanish and English as she navigates her daily life. She credits her bilingual upbringing with not only opening professional doors internationally but also sharpening her problem-solving skills. She might be […]