Just as Kahneman predicted, the adversaries explained away the discrepancies.

Source: https://www.wired.com/story/this-contest-put-theories-of-consciousness-to-the-test-heres-what-it-really-proved/

Now Kahneman has re-analysed his work in collaboration with Harvard University psychology doctoral student and former software product manager Matthew Killingsworth, who found no happiness plateau at all in a 2021 study researching the same topic.

Source: https://mybroadband.co.za/news/investing/482941-money-does-buy-happiness-us-study.html