Some ranting about positive psychology and the self-help industry
There is a very appealing concept sold by the positive living industry: the critical positivity ratio, or the Losada line. First published in 2005 by the psychologists Marcial Losada and Barbara Fredrickson, their paper uses nonlinear dynamical modelling to show that people need a ratio of just three positive interactions to one negative one to live happier, healthier lives. It's a brilliant idea, combining mathematical legitimacy and common sense into one weird old tip for being happier. What a shame, then, that it's also complete bollocks. The critical positivity ratio was debunked by Nick Brown, a graduate student in applied positive psychology, Alan Sokal, a physicist most famous for trolling the journal Social Text by writing complete shit and getting it published, and the psychologist Harris Friedman. There were severe flaws in the theory - for example, in several of Losada's analyses the data used did not meet the basic criteria for using differential equations ...