Why We Do What We Do
Unpack the invisible forces shaping your thoughts, feelings, and everyday choices. Learn to spot mental blind spots, read social dynamics, and understand the brain's capacity for change.
Like Duolingo, but for Why We Do What We Do. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
24 levels across 3 sections, about 48 minutes end to end, roughly 10 days at five minutes a day. It moves through The Mechanics of Your Own Mind; People, Groups, and Daily Actions; and The Biology of Growth and Resilience. It starts from scratch.
Free forever · No credit card · iPhone & Android

Key ideas in Why We Do What We Do
- Fast intuitive thinking developed to keep humans alive by making split-second decisions before slow analysis can finish
- Mental shortcuts deliberately trade meticulous precision for immediate reaction speed
- A false alarm (treating a hose like a snake) is far less costly in evolutionary terms than failing to spot a real threat
- Confirmation bias leads people to actively register and remember events that match their pre-existing theories
- It leads people to overlook, discount, or explain away facts and events that contradict those theories
- Systematically gathering objective data across all conditions is the deliberate antidote to confirmation bias, not an example of it
- The halo effect occurs when one prominent positive characteristic spills over into an unearned positive rating of unrelated traits
- Physical attractiveness and high charisma are classic triggers that lead observers to assume someone is also competent or morally sound
- The bias operates without conscious awareness, leading judges to believe their overall evaluation is completely objective
- Hindsight bias rewrites memory after an event occurs, making the outcome feel like it was predictable all along
- It causes people to judge decisions solely by their outcome rather than by the information genuinely available at the time
- This bias creates overconfidence and unfairly penalizes decision-makers who faced genuine uncertainty
- Anchoring pulls estimates, valuations, and willingness to pay toward the first number presented, even if that number is arbitrary
- Subsequent adjustments away from an anchor figure are typically insufficient
- Initial reference points dictate whether a final number feels expensive, cheap, generous, or fair
- Memories are not stored as fixed, continuous recordings that play back identically each time
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Why We Do What We Do the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
What deal do your brain's mental shortcuts make?
Get it right to open this lesson and 23 more in the app.
How to learn Why We Do What We Do, step by step
Go in order. 24 short levels across 3 sections, about 48 minutes in all, five minutes a day.
- 1
The Mechanics of Your Own Mind
- Spotting Mental Shortcuts and Blind Spots
- How Memory Actually Works
- Making Sense of Everyday Emotions
- 2
People, Groups, and Daily Actions
- Deciphering Social Pressures and Group Dynamics
- Unpacking Motivation and Decision-Making
- Designing and Breaking Habits
- 3
The Biology of Growth and Resilience
- The Brain's Capacity for Lifelong Change
- Building Psychological Resilience
3 sections · 8 units · 24 levels. Built to play, not to enroll.
Questions about Why We Do What We Do
How do I learn Why We Do What We Do?
Go in order: start with The Mechanics of Your Own Mind, then People, Groups, and Daily Actions, then The Biology of Growth and Resilience. On Tomo that's 24 short levels, about 48 minutes in all, played five minutes a day. Start free and play the first level in under a minute.
Is there a Duolingo-style app for Why We Do What We Do?
Yes. Tomo works like Duolingo: short daily lessons, streaks and quick quizzes. Why We Do What We Do is one of its free courses, and you can type any other topic to get a course of your own.
Is the Why We Do What We Do course free?
Yes. Why We Do What We Do is playable on Tomo's free plan, which doesn't expire. No credit card, no waitlist. Download the app and start your first lesson.
How long does it take to learn Why We Do What We Do?
24 levels across 3 sections, about 48 minutes of play in total. It's built for five minutes a day, so you finish it a little at a time instead of all at once.
Do I need any background to start Why We Do What We Do?
No. It's pitched at a beginner level, so it starts where you are and builds up. If you can tap a phone, you can start.
Tomo is in ChatGPT
Tomo is also a ChatGPT plugin: the same playable courses, built and played inside your chat.
Add Tomo to ChatGPT- What to ask
- “Make me a Tomo course on black holes.” “Turn this chat into a Tomo course.”
- What you get
- Quick questions with instant feedback, hearts and stars, ready to play in about a minute.
- Where it goes
- No sign-up to start. Connect your Tomo account and your streak carries on in the app.
You pick the voice
Why We Do What We Do is taught in the Explain Like I'm 5 style: no big words. promise.. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
More Psychology on Tomo
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Psychology: How Minds Actually Work
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Psychological Mechanics: Mind and Behavior
Move beyond pop-psychology buzzwords to understand the mechanisms governing thought, emotion, and social dynamics. Learn how mental shortcuts shape decisions, how groups manipulate behavior, and how memory reconstructs reality.
The Psychology of Everyday Life
Discover why you think, feel, and act the way you do. This course turns the lens on your own mind to reveal the hidden patterns that drive your daily decisions and social interactions.
Everyday Psychology
Make sense of why people think, react, and decide the way they do. Learn to spot mental shortcuts, understand emotional wiring, and see through invisible social pressures in everyday life.
Everyday Psychology
Discover why you make irrational choices, misremember yesterday's events, and copy the crowd. Learn the core principles behind daily human behavior through relatable, real-world examples.
Start Why We Do What We Do today.
Download Tomo, search Why We Do What We Do, and play your first lesson in under a minute.