It's hard to definitively prove fraud, but this is a shockingly clear case. I cannot fathom a plausible alternative explanation. Dan Ariely faked data. P.S. You simply must read the actual post. It is absolutely riveting. Amazing work from the @datacolada.bsky.social crew. And, also, great writing
Colada[139] Artificial Deadlines Part 2 Evidence of fraud in the 25 year old gradesheet behind the key finding in an influential paper on deadlines and procrastination. datacolada.org/139