I enjoyed Brian Wansink’s book Mindless Eating–it was well written and filled with creative experiments like the ever filling soup bowl. In the ten years since that time Wansink became not just a media start but an academic star with an h-index of 75 and over 24 thousand citations. In recent years, however, he has had to retract papers in the light of inconsistencies and questions about his data and statistics.
A Buzzfeed article, based in part on emails, now reveals that Wansink was running a brazen p-hacking factory:
The correspondence shows, for example, how Wansink coached Siğirci to knead the pizza data.
First, he wrote, she should break up the diners into all kinds of groups: “males, females, lunch goers, dinner goers, people sitting alone, people eating with groups of 2, people eating in groups of 2+, people who order alcohol, people who order soft drinks, people who sit close to buffet, people who sit far away, and so on…”
Then she should dig for statistical relationships between those groups and the rest of the data: “# pieces of pizza, # trips, fill level of plate, did they get dessert, did they order a drink, and so on…”
…“Work hard, squeeze some blood out of this rock, and we’ll see you soon.”…All four of the pizza papers were eventually retracted or corrected.
In essence, Wansink all but published a study finding green jelly beans cause acne. All hail XKCD.