Brain Level
Blog
The Brain Level blog
How cognitive tests work, what a score can and cannot tell you, and which training has evidence behind it. Free to read — no account, no e-mail.
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Cognitive Science 8 min read · 22 August 2026The 5 Areas a Cognitive Test Measures: Why a Single IQ Number Misleads You
Discover the five distinct domains of human intelligence, why single-number IQ scores mask cognitive bottlenecks, and how to read your cognitive radar chart.
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Memory 7 min read · 20 August 2026How to Improve Working Memory: Why Your Brain Runs Out of RAM
Discover the biological limits of working memory, why your mental buffer overflows, and 3 proven protocols to expand your cognitive bandwidth.
- Assessment 5 min read · 16 August 2026
What an IQ score actually means
A score is a position in a distribution, not a quantity of intelligence you carry around. Here is what the number is measuring, and what it cannot tell you.
- Evidence 7 min read · 16 August 2026
Does brain training work? What the evidence actually says
The honest answer has two halves, and most of the industry only sells the first. Near transfer, far transfer, and how to tell a useful exercise from a slot machine.
- Training 6 min read · 16 August 2026
Working memory: what it is, and what actually trains it
The few seconds of mental desk space you do all your thinking on. Why it feels like forgetfulness, what reliably improves, and what the research does not support.
- Focus 6 min read · 16 August 2026
Why your focus collapses, and what rebuilds it
Attention does not run out like a battery. It is captured, and the switching is what costs you. What the research says about interruption, and a routine that survives a real week.
- Assessment 5 min read · 16 August 2026
Can you get better at IQ tests? The practice effect, honestly
Scores really do rise on a second attempt — and most of that rise is the test, not you. What retesting can and cannot prove about your own progress.
- Assessment 6 min read · 16 August 2026
How to spot a fake IQ test online
Most free tests are lead magnets with a flattering number attached. Eight checks that separate a real measurement from a sales page with questions on it.
Educational and entertainment content. Nothing here is medical, psychological or employment advice, and no online test is a clinical assessment.