Interesting. I read his book Predictably Irrational and quite liked it (of course that doesn't imply he's a good scientist). Are there any other scandals he is involved in?
[0] https://statmodeling.stat.columbia.edu/2021/08/19/a-scandal-...
I think the comments on this page vaguely mention other things, but couldn’t find much concrete last I checked
The only thing[0] I could find was one person who questioned how he could technically make a shredder do what he said he did in one experiment (and there were even photos of the shredded-but-only-at-the-edges papers)
[0] https://fraudbytes.blogspot.com/2021/08/top-honesty-research...
Anybody with a good talent for picking up liars from a voice recording willing to share an opinion?
(Edited to add) thinking about it, this could be an honest mistake. You could "remove the teeth with a screwdriver" by disassembling the shredder and removing some blades from the axle, which corresponds to how the shredder in this paper was supposed to work. If Dan Ariely got a grad student to modify the shredder, he could simply have misunderstood their explanation of how they did so. How the shredder was modified was not, after all, important to the experiment.
(Edit 2) Although, those who ran the experiment would need to keep the missing teeth out of the line of sight of the subjects.