Every lesson is grounded in established research — written so a 16-year-old and a 22-year-old both find it genuinely interesting, not dumbed down.
Every lesson follows the same format — so the format becomes invisible and you're left with just the learning.
Starts from a situation you've been in. The psychology comes second — after you already care about the answer.
Not a quiz at the end. Quick checks throughout that force retrieval — the thing that actually creates memory.
Get it wrong and the AI explains it differently — not the same answer again, a new angle matched to how you learn.
At the end of each lesson, the AI links it to what you've learned before — so concepts build on each other.
You and a friend have a disagreement about how a conversation went last week. You both remember it clearly. You're both being completely honest. And you're both wrong about different parts of it.
This isn't just stubbornness or selective memory. It's a specific, well-documented cognitive mechanism called confirmation bias — and it doesn't just distort how we interpret new information. It actually reshapes the memory itself, every time we recall it.
Quick check: which of these is closest to what's actually happening?
That's the one. Memory isn't a recording — it's a reconstruction. Each time you recall something, your current beliefs and emotions subtly edit the memory. This is why eyewitness testimony is notoriously unreliable, even from people being completely honest. Want to see how this connects to the "Mandela Effect" lesson you did Tuesday?
The predictable, invisible shortcuts your brain takes — and why "just think harder" doesn't fix them. 18 lessons.
Illusory superiority — why 93% of people rate themselves as above-average drivers.
Availability heuristic — how easily recalled events skew our perception of risk.
Anchoring bias — how initial numbers distort all subsequent judgements.
Confirmation bias — how existing beliefs reshape memory itself.
Peak-end rule — how we judge experiences by their peaks and endings, not averages.
The full library of the most impactful and frequently misunderstood cognitive biases.
The actual mechanics of how habits form, why willpower is overrated, and what really changes behaviour. 14 lessons.
How habits are encoded in the brain, and why understanding the loop is the only way to change one.
Ego depletion and why relying on willpower is a losing strategy for long-term behaviour change.
The overjustification effect — what happens when you pay someone to do something they already love.
Choice architecture and friction — why your environment matters more than your intention.
Goal gradient theory and the motivational math of progress — why 1% better every day beats annual resolutions.
Evidence-based strategies for building habits that stick — and breaking ones that don't.
How tone, framing, and timing change what people hear — and how to notice when it's being used on you. 12 lessons.
How the same information packaged differently produces opposite responses.
Why agreeing to small requests makes you far more likely to agree to large ones later.
Recency bias in persuasion — the timing advantage in conversations and debates.
The difference between waiting to speak and actually listening, and what it does to relationships.
Affect heuristic — how emotion shapes reasoning and what that means for how you make your case.
Cialdini's principles and the full toolkit of ethical and unethical persuasion.
What's actually happening in your body during stress, anxiety, and conflict — and what genuinely helps. 13 lessons.
The HPA axis, cortisol, and why your stress response exists — and when it works against you.
Cognitive reappraisal vs. suppression — the evidence on what actually reduces emotional intensity.
Emotional granularity — the surprising link between emotional vocabulary and emotional control.
Why problem-focused thinking in the wrong context deepens distress instead of resolving it.
The neuroscience of sleep deprivation and the amygdala — why you're more reactive when you're tired.
A research-grounded library on what emotions are, how they work, and how to work with them.
Why "rational choice" is mostly a myth, and how to spot when your decisions are being shaped for you. 11 lessons.
Kahneman's dual-process theory — when to trust your gut and when it betrays you.
Sunk cost fallacy — and the evidence-based way to make cleaner exit decisions.
Prospect theory and the asymmetry of gains and losses in human decision-making.
The paradox of choice — and the counterintuitive relationship between options and satisfaction.
The power of the default option — and who designs them, and why.
The full decision-making library — what research says about how humans actually choose.
No card. No setup. First three lessons in every topic area are free forever.
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Social psychology
Why groups change how individuals act — from peer pressure to why bystanders freeze. 15 lessons.
Why nobody helped — the bystander effect explained
Diffusion of responsibility — why more bystanders means less chance of intervention.
Why you dress differently around different groups
Social identity theory — how group membership changes self-perception and behaviour.
The experiment that explains how ordinary people do terrible things
Milgram's obedience studies — authority, compliance, and where personal responsibility goes.
Why you work harder when people are watching
Social facilitation — the audience effect and when it helps vs. hurts performance.
Why groups make riskier decisions than individuals
Groupthink and risky shift — how collective decisions systematically drift from rational ones.
In-group bias, conformity, social loafing, and 7 more
The full social psychology library — covering the landmark studies and what they actually mean for your life.