Critique of Barbara Frederickson's Happiness Research

Debunking Barbara Fredrickson's happiness research: it's a maths problem. Fredrickson collected the wrong kind of data to use with her co-author Losada's differential equations, and Losada's math is gibberish, according to a new paper by Brown, Sokal, and Friedman. (Hat tip to Marginal Revolution; Will Wilkinson blogs the story.)