The two halves of TrueWedge
TrueWedge is built around two complementary ideas:
- Honest geometry in selection: In our random selection wheel, a slice with a 20% probability strictly occupies 20% of the circle. The picture is never allowed to disagree with the odds.
- Visual calibration in estimation: A suite of interactive games and research essays designed to measure, demonstrate, and train human judgment against the biological distortions of our visual perception.
Whether judging the slice of a pie chart, evaluating the height of a bar graph, or assessing medical risk, human eyes and brains make predictable estimation errors. This hub is the home for our research, calibration tools, and daily estimation challenges.
Foundational research & essays
In-depth, academically cited examinations of how humans perceive proportions and how visual encodings influence judgment.
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Foundational Essay
How We Misjudge Proportions: Psychophysics, Deceptive Geometry & Real-World Stakes
A comprehensive breakdown of Stevens’ Power Law, the Cleveland–McGill graphical hierarchy, deceptive non-zero axis truncation (such as making a 10-point difference look 300% larger), denominator neglect, and the direct stakes for personal finance and healthcare decisions.
Interactive estimation games
Planned tools to test your visual intuition against mathematical truth.
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Angle & Wedge Estimation
Practice estimating circle sector percentages and angles without guides. Discover where your eye systematically over- or under-estimates proportions.
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Area vs. Length Comparator
Experience Stevens’ Power Law firsthand. Compare your accuracy judging 1D linear bar lengths against 2D circles, squares, and 3D shapes.
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The Deceptive Axis Spotter
Train your eye to detect truncated baselines, disproportionate pictograms, and stretched aspect ratios in real-world media and financial charts.
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Daily Perception Challenge
A daily 60-second perceptual challenge testing your visual calibration on random ratios, distributions, and demographic proportions.
Why calibration matters
When people cannot accurately read visual proportions, they become vulnerable to manipulative marketing, misleading financial products, and distorted public policy debates.
By combining honest geometric rendering with active perceptual training, TrueWedge aims to make accurate quantitative intuition accessible to everyone.