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Research-based notes on IQ, EQ, memory, and how these tests actually work. No hype, no pseudoscience.
Brain science24 Jul 2026
Nutrition and Brain Performance: What You Eat Affects How You Think
The link between nutrition and cognitive performance is well-established. Here's what to eat, and what to avoid, for optimal brain function.
IQ17 Jul 2026
Growth Mindset and Intelligence: Does Believing You Can Improve Actually Help?
Carol Dweck's growth mindset research is hugely popular. Here's what the evidence actually shows, the real findings and the important nuances.
- IQ
12 Jul 2026
How IQ Is Measured, The Science Behind IQ Tests
How is IQ actually measured? Learn how IQ tests work, how scores are calculated, and what the number really means, from the science of psychometrics.
EQ10 Jul 2026
Emotional Regulation: What It Is and How to Improve It
Emotional regulation is the ability to manage your emotions effectively. It's a core component of EQ and a key predictor of mental health and relationship quality.
- IQ
05 Jul 2026
Best Free IQ Tests Online (2026), Ranked and Reviewed
The best free IQ tests online ranked by accuracy, design, and no-paywall policy. Find a real free IQ test with instant results, no email or sign-up required.
- IQ
03 Jul 2026
Sleep and Intelligence: How Sleep Quality Affects Your Cognitive Performance
Poor sleep impairs memory, reasoning, and IQ-test performance. Here's what the research shows about the sleep-intelligence relationship.
- IQ
28 Jun 2026
How Accurate Are Free IQ Tests? What the Research Says
Are free online IQ tests accurate? We look at what makes a test reliable, how online tests compare to clinical assessments, and what your score actually tells you.
- IQ
26 Jun 2026
What Is Executive Function? A Plain-English Guide
Executive function is the brain's management system, planning, focus, impulse control, and flexibility. Here's what it is, why it matters, and how to strengthen it.
- IQ
21 Jun 2026
Mensa IQ Test Explained, How to Qualify and What It Measures
Everything you need to know about the Mensa IQ test, what score you need to qualify, how the test works, and how to prepare. Plus a free practice test.