> Each time I read a story about how doing X improves a child's ability I simply think, well yeah, paying more attention to them does that. This is a problem w

> Each time I read a story about how doing X improves a child's ability I simply think, well yeah, paying more attention to them does that. This is a problem with a lot of research on educational methodologies as well, in that there is usually some selection bias being applied to the teachers participating in a study, as well as a placebo effect.