Excellent question! Mostly the research of people like John Ioannidis or Brian Nosek or Megan Head. http://journals.plos.org/plosbiology/article?id=10.1371/jou

Excellent question! Mostly the research of people like John Ioannidis or Brian Nosek or Megan Head. http://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.1002106 http://journals.plos.org/plosbiology/article?id=10.1371/jour... https://www.google.com/url?sa=t&source=web&rct=j&url=http://robotics.cs.tamu.edu/RSS2015NegativeResults/pmed.0020124.pdf&ved=0ahUKEwiW_87a3p7LAhXsvYMKHaV8ABsQFggeMAA&usg=AFQjCNE2rEvKJYMaZCd1DmPexoGavyZODQ&sig2=1A93admlZoGYVjzwMkb8Qw https://www.google.com/url?sa=t&source=web&rct=j&url=http://... http://www.npr.org/sections/money/2016/01/15/463237871/episode-677-the-experiment-experiment http://www.npr.org/sections/money/2016/01/15/463237871/episo...