This isn't a study, this is an essay about an activity that some people did.
Its probably due from once trusted institutions getting so much wrong from the health pyramid, replication crisis, even election polling.
Nasim Taleb has a good series on why distrust is increasing.
https://medium.com/incerto/the-intellectual-yet-idiot-13211e...
>Trait increases tolerance, improves decision-making, study says