Free cognitive bias tool

Thinking Fast & Slow Visualizer

Explore the book's core ideas without needing a psychology lecture: fast intuition, slow deliberation, cognitive ease, anchors, base rates, and the way losses loom larger than gains.

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System 1

Automatic, associative, quick, effortless — excellent for patterns, vulnerable to bias.

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System 2

Deliberate, analytical, slower, effortful — powerful when you give it attention.

Tune the decision environment

Move the sliders to see which mode is likely to dominate and which bias deserves attention.

Time pressure calm70urgent Familiarity / fluency awkward72easy Decision stakes low55high Statistical evidence story only35base rates

System 1
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System 2
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Anchoring

An initial number can quietly pull later estimates toward it, even when the anchor is arbitrary.

Loss aversion

A possible loss often feels more intense than an equivalent gain, shaping choices around risk and change.

Base rates

Vivid stories can crowd out statistics. Better judgement asks, “What usually happens in cases like this?”

Framing

The same facts can feel different when presented as survival vs mortality, savings vs loss, or risk vs certainty.

Availability

Recent, emotional, or memorable examples can feel more common than they really are.

Cognitive ease

Clear, familiar, repeated information feels true and safe, so slow down when ease may be substituting for evidence.

This educational tool is an original summary inspired by common concepts associated with Daniel Kahneman's Thinking, Fast and Slow; it is not a substitute for the book.