Positive findings are around twice as likely to be published as negative findings. This is a cancer at the core of evidence-based medicine.
Ben GoldacreI write about misuses of evidence in plenty of different spheres: scaremongering journalists, obvious quacks and naturopaths, and flaws in the way that evidence is used in mainstream academia, medicine and in (government) policy. One of the things I always found interesting is the same tricks are used to distort medicine in all of those domains.
Ben Goldacre