Book Summaries & Big Ideas
Why We Sleep by Matthew Walker: What It Gets Right and Wrong
The Why We Sleep book, claim by claim: what a 2019 critique, Walker's own replies and later reviews show about short sleep, cancer, death and one chart.
Mind & Learning Editor
Mary Alizadeh
Articles
Creativity & Problem Solving
Does Brainstorming Work? What Decades of Research Show
Does brainstorming work? Since 1958, lab studies have found people working alone out-produce talking groups. Why, and when group ideas pay off.
Decision Making & Critical Thinking
The Dunning–Kruger Effect: What It Really Says and What It Doesn't
The 1999 Dunning-Kruger paper never drew 'Mount Stupid'. Statistics explain part of its pattern, but two 2021 studies of about 4,000 people each found a gap.
Mindset, Discipline & Resilience
Perfectionism Explained: Healthy Striving vs. the Kind That Hurts
Perfectionism has 2 sides: very high standards, and fear of mistakes with harsh self-judgment. Research ties the second far more closely to distress.
Memory & Brain Performance
Do Brain-Training Games Work? What Large Studies Found
Do brain-training games work? From a 2010 BBC trial to 20 years of US data, large studies find they train the game, not everyday memory.
Learning How to Learn
The 10,000-Hour Rule: What the Original Research Really Found
The 10,000-hour rule began as an average from one 1993 violin study. Later research finds practice matters but explains far less than the rule implies.
Book Summaries & Big Ideas
Thinking, Fast and Slow by Daniel Kahneman: Key Ideas and Whether They Hold Up
A Thinking, Fast and Slow summary checked against later replications: its research on choices holds up, while chapter 4's priming studies did not.
Creativity & Problem Solving
The Incubation Effect: Why Stepping Away Solves Problems
Setting a stuck problem aside helps on average in lab studies. When a break works best, what to fill it with, and 2 popular explanations that did not hold up.
Learning How to Learn
Test Anxiety: Why Your Mind Goes Blank and What Helps
On average across OECD countries, 55% of 15-year-olds in PISA 2015 felt very anxious before tests even when prepared. Why minds go blank, and what helps.
Decision Making & Critical Thinking
Groupthink: What It Is, Famous Examples, and How to Prevent It
Groupthink is a group's wish to agree overriding its judgment. Janis's 8 warning signs, the Bay of Pigs and Challenger, and what research says prevents it.
Mindset, Discipline & Resilience
Impostor Syndrome Explained: Why So Many Capable People Feel Like Frauds
Impostor syndrome was named in 1978 and is not a diagnosis. What the research shows about who feels like a fraud, why success fails to help, and what does.
Memory & Brain Performance
How to Remember Names: A Method That Works at Parties and Meetings
4 steps for remembering names, built on the best-tested one: recall a new name to yourself soon after you hear it, then again after longer gaps.
Learning How to Learn
How to Learn a Language as an Adult: What the Research Supports
Adults can learn a language well, but slowly: US government trainees study 24 to 88 weeks full-time. Five research-backed steps, and what apps can do.
Memory & Brain Performance
Dementia Risk Factors You Can Change: What Major Reviews Conclude
A 2024 Lancet Commission links 14 changeable dementia risk factors to about 45% of cases. What WHO's 2026 guideline and trials like FINGER add.
Mindset, Discipline & Resilience
Self-Compassion Explained: What Kristin Neff's Research Shows
Kristin Neff defines self-compassion in 3 parts. What research shows on distress, motivation and training, and the open dispute over how it is measured.
Decision Making & Critical Thinking
Analysis Paralysis: Why You Can't Decide and How to Get Unstuck
Analysis paralysis ties to hard trade-offs and fear of regret. Why choices stall, how solid the research is, and 5 ways to get unstuck.
Book Summaries & Big Ideas
Deep Work by Cal Newport: Summary, Key Ideas, and Critique
A Deep Work summary and critique: Cal Newport's 4 rules, what field studies of protected work time support, and where the book's evidence runs thin.
Creativity & Problem Solving
Writer's Block: What Research Says About Causes and Fixes
Writer's block research since 1980 links it to rigid rules, harsh self-talk and waiting for the mood. What helps, plus a 2-week routine to test.
Creativity & Problem Solving
Design Thinking Explained: The Five Stages With Examples
Design thinking in 5 stages: empathize, define, ideate, prototype and test. What each asks of you, an example, and what research supports.
Decision Making & Critical Thinking
How to Use a Decision Matrix: Comparing Options With Weighted Criteria
How to build a decision matrix in 6 steps: pick criteria that don't overlap, score one column at a time, weight the gaps, then test the winner.
Mindset, Discipline & Resilience
What Is Resilience? What Decades of Research Reveal
What is resilience? The psychology definition, why long-term studies find it the most common response to hardship, and what 6 decades of research leave open.
Book Summaries & Big Ideas
The Psychology of Money by Morgan Housel: Summary and Key Lessons
The Psychology of Money summary: Housel's 19 stories, then the evidence on experience, compounding and 'enough' across US, Finnish and German data.
Memory & Brain Performance
Mnemonics for Beginners: The Memory Techniques Worth Learning
4 mnemonics worth learning as a beginner, why they work, and where the evidence behind each one is solid, thin or surprisingly weak.
Learning How to Learn
The Feynman Technique: Learn a Topic by Explaining It in Plain Words
The Feynman technique in 4 steps: explain a topic aloud in plain words, find where you stall, then fix it. What research on learning by explaining supports.
Book Summaries & Big Ideas
Atomic Habits by James Clear: Summary, Key Ideas, and Critique
An Atomic Habits summary that scores 9 of the book's ideas against habit research: which hold up, which are untested, and which the evidence contradicts.
Creativity & Problem Solving
How to Come Up With Ideas: 12 Techniques Worth Trying
How to come up with ideas: 12 techniques, from working alone first to a walk or an AI draft, each labelled for how strong its evidence is.
Decision Making & Critical Thinking
How We Make Decisions: The Psychology in Plain English
How we make decisions: fast impressions, slower checks and mental shortcuts, plus which classic findings held up across 36 samples and which did not.
Learning How to Learn
Learning Styles Are a Myth: What the Research Actually Shows
Nearly 9 in 10 educators surveyed believe matching teaching to a learning style helps. The few experiments designed to test that claim found no benefit.
Decision Making & Critical Thinking
Mental Models Explained: A Beginner's Guide to Thinking Tools
Mental models have 2 meanings: the mind's inner simulations and a popular toolkit. What research says about which thinking tools carry over.
Book Summaries & Big Ideas
Getting Things Done by David Allen: What It Gets Right and Wrong
A Getting Things Done summary and critique: what 2011 experiments support in David Allen's method, what no trial has tested, and which parts look dated.
Creativity & Problem Solving
What Is Creativity? How Psychologists Define and Measure It
What is creativity? Psychologists define it as work that is both original and effective. How it is measured, what tests miss, and 3 myths to drop.
Learning How to Learn
Active Recall: How to Study by Testing Yourself
Active recall means answering from memory before you check. In a 2008 lab study, repeated recall, not rereading, decided what students kept a week later.
Memory & Brain Performance
Working Memory Explained: Your Brain's Mental Scratchpad
Working memory is the mind's small scratchpad. A 2017 review counted 9 definitions; here are the main models, how it is tested and what lowers it.
Decision Making & Critical Thinking
Cognitive Biases Explained: Why Your Brain Takes Shortcuts
Cognitive biases are shortcuts misfiring, not brain defects. Anchoring and framing survived a retest in 36 samples; bias scores barely correlate.
Mindset, Discipline & Resilience
What Is a Mindset? How Your Beliefs Shape What You Do
The psychology definition of a mindset, where fixed and growth mindsets came from, and what a 12,490-student trial and 2 meta-analyses found.
Mindset, Discipline & Resilience
Self-Discipline Explained: Skill, Trait, or Just a Well-Designed Life?
Self-discipline is 3 things at once: a trait, a skill and a well-designed setting. What the evidence, including failed willpower tests, says about each.
Memory & Brain Performance
How Memory Works: Encoding, Storage, and Retrieval Explained
How memory works in 3 stages: encoding, storage and retrieval. Why meaning helps words stick, why you hold about 4 chunks and why recall rebuilds.
Learning How to Learn
Learning How to Learn: A Research-Backed Guide for Beginners
Learning how to learn: a 2013 review rated only 2 of 10 study techniques highly useful, self-testing and spacing. How beginners can use them, step by step.