Gut Check
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Gut Check
PlayableEight choices. One hidden detail. Trust your gut?
Gut Check is a free cognitive bias quiz about the little details that can influence big decisions. Answer eight quick questions with your first instinct, then discover the alternate version you did not see. One number, one word or one pre-checked box can make the same situation feel surprisingly different.
Each question randomly gives you one of two versions inspired by familiar behavioral psychology experiments. You might estimate a number, choose between a sure outcome and a gamble, or decide whether to keep a default selection. The reveal puts both versions side by side and explains the bias behind them.
Before the reveal, guess how many of your answers followed the direction of the nudge. Your final score is out of eight, with a result image you can share. Play this short decision-making game free in your browser on desktop or phone, without an account or download. Curious how predictable your choices really are? Try to outsmart the pattern-reading machine in Are You Random? or map your thinking style in Mind Lab. Gut Check is part of our collection of free psychology games.
How to play
Press Start and answer all eight questions. Some ask for a number, some offer two choices, and the final question uses a checkbox. Go with your first answer rather than trying to find the trick.
After the questions, predict how many answers went in the direction suggested by your question versions. Pick a number from zero to eight and choose Show me.
Read each twin-question reveal to compare the version you saw with the other version. Choose Next twin to continue, then See my score for your result and shareable image. Play again gives you a fresh random mix of versions.
What is a cognitive bias?
A cognitive bias is a systematic tendency in how people interpret information or make judgments. Mental shortcuts are often useful, but they can also make irrelevant numbers, wording and presentation affect a choice. Noticing these effects is easier when you can compare two almost identical questions.
Gut Check makes that comparison visible. It is not a knowledge quiz with eight correct answers: the interesting part is whether your estimate or choice lines up with the influence built into the version you received.
Anchoring, framing and default choices
Anchoring asks whether an initial number pulls your estimate toward it, even when that number is implausible. A brief multiplication estimate explores how starting with small or large numbers can shape an answer. Other questions look at the effect of wording, relative savings and a price presented before your own estimate.
The framing effect compares choices described as gains or losses. A question about allowing versus forbidding an action shows how wording changes the apparent decision, while the final checkbox explores default choices: keeping a pre-selected option can feel easier than changing it. The reveals name the effects and cite the studies that inspired them.
How to read your cognitive bias test score
The score counts how many of your eight responses match the direction the game associates with your assigned versions. Compare it with your prediction, but do not treat it as a measurement of intelligence, rationality or mental health. A low score does not prove you are immune to bias, and a high score does not mean you make bad decisions.
You answer only one version of each question. The game therefore cannot know whether you personally would have answered differently under the other version. The comparison figures are built-in study-inspired reference values, not live statistics from TwentyFun players or a new controlled experiment.
FAQ
What is Gut Check?
Gut Check is a free cognitive bias quiz with eight questions inspired by behavioral psychology experiments. Answer one randomly assigned version, then compare it with an alternate version that changes a small detail.
Is this a scientific cognitive bias test?
No. It is an educational browser game, not a validated psychological assessment. It illustrates possible influences on decisions and cannot diagnose a condition or measure your overall susceptibility to bias.
What does the score out of eight mean?
It counts responses that went in the direction the game associates with your question versions. It does not establish that the wording caused your answers to change, because you did not answer both versions.
Which cognitive biases appear in the quiz?
The eight questions explore anchors, order of information, gain-versus-loss framing, wording, relative savings, price suggestions and default choices.
Are the comparison numbers live player results?
No. They are built-in study-inspired reference figures. Gut Check does not currently collect player answers to calculate live comparison statistics.
Can I play Gut Check on my phone?
Yes. Play free on mobile or desktop, without a download or account. The result includes an image and a Copy result button, with image sharing available where your browser supports it.
An educational game inspired by psychology experiments, not a clinical or validated cognitive bias test. Scores show response alignment, not proof that a nudge changed your answer; comparison figures are built-in references, not live player data.
