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Monday light reading: Stevens' power law

August 24, 2009

A post on Junk Charts sent me reading about Stevens' power law, which supplies a quantification of a problem I've discussed before: the danger of representing single-dimensional data with two-dimensional graphics. Stevens' law measures the amount by which humans over- or under-perceive a stimulus, relative to its actual intensity. For example, the coefficient for "visual […]

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June 2, 2009

An article in Friday's NYT called "Let the Kid Be" was accompanied by this graphic: I don't like this presentation because I think it is misleading. But first, a little history: You may remember last year a JP Morgan chart was circulated which showed the deterioration of bank's market values. The old and new market […]

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