Free mental models test
Free Mental Models Test
Fifteen real work decisions. Pick what you would actually do. See which of six mental models you naturally reach for and which one is worth building next.
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Analyzing your responses…
What are mental models?
Mental models are the thinking tools you use to make sense of a problem and decide what to do. Investor Charlie Munger popularized the idea that good decision-makers carry a small set of models and pick the right one for the situation, rather than solving everything the same way.
Most people lean on one or two models without noticing. That works until a problem calls for a different tool. This free mental models test shows which ones you reach for, so you can use them on purpose and practice the ones you skip.
The 6 mental models this test measures
Systems Thinking
Seeing how the parts of a problem connect and feed back on each other.
Ask: what is causing this to keep happening?
First-Principles Thinking
Breaking a problem down to what is definitely true and rebuilding from there.
Ask: what do we know for certain?
Second-Order Thinking
Looking past the immediate result to the consequences that follow.
Ask: and then what happens?
Inversion / Pre-Mortem
Working backward from failure to see what would have to go wrong.
Ask: if this failed, why did it fail?
Opportunity Cost / Trade-off
Weighing every yes against what it means saying no to.
Ask: what am I giving up by choosing this?
Test-and-Learn
Running small experiments and letting evidence guide the next step.
Ask: what is the smallest way to find out?
How the test works
You face 15 realistic work decisions, such as a recurring bug, two projects competing for your time or next year’s budget. Each has four responses, and each response reflects one main mental model and a second related one. There are no right answers: every model is the best tool in some situations. Your choices add up to a profile of how often you reach for each model.
What your results show
- Your thinking style: a bar for each of the six models, showing how much you rely on it
- Your two go-to models: what each says about how you decide and where it can mislead you
- Your growth edge: the model you use least, and why adding it would round out your thinking
Create a free profile and your thinking style is saved next to your other results, including your decision-making style and your cognitive biases.
How to use mental models at work
- Name the model before a big decision. Saying “let’s run a pre-mortem” or “what’s the trade-off?” makes the team’s thinking visible.
- Pair your favorite with its opposite. Test-and-learn thinkers benefit from second-order thinking; first-principles thinkers benefit from trade-offs.
- Practice your growth edge on small calls. Low-stakes decisions are the easiest place to try a model you rarely use.
Better mental models are the foundation of strategic thinking and good leadership. For quick structures you can use today, read 7 decision-making frameworks you can use in 10 minutes.
Your Mental Models Test Questions, Answered
Straight answers about the test, the six models and how to think better with them.
Is the mental models test free?
Yes. The test is completely free and needs no sign-up. You see your thinking style, your two go-to models and your growth edge as soon as you finish.
How long does the test take?
About 5 minutes. There are 15 short work decisions, each with four possible responses. Choose what you would really do, not what you think you should do.
What are the most useful mental models?
For everyday work decisions, six do most of the heavy lifting: systems thinking, first principles, second-order thinking, inversion, opportunity cost and test-and-learn. This test measures all six.
Which mental model is best?
None on its own. First principles suits new problems, test-and-learn suits uncertainty and inversion suits high-stakes risks. Strong thinkers pick the model that fits the situation.
Can I learn new mental models?
Yes. Mental models are habits of thought, so they grow with practice. Pick your growth edge from the results and use it deliberately on a few small decisions each week.
Is this a scientifically validated test?
No. It is a self-reflection tool that shows which thinking approaches you tend to favor. Use it to start a conversation with yourself or your team, not as a formal assessment.