I'm not much interested in that particular study. I'm discussing your tl;dr which is
The smarter you are, the less likely you are to change your mind on certain issues when presented with new information
You, clearly, think this is bad. I, on the contrary, think that in certain situations -- to wit, when your stream of evidence is filtered -- NOT updating on new information is a good idea.
I feel this is a more interesting issue than going into the details of that study.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.