Probably a good thing they asked volunteers interested in the study to do it instead of someone such as yourself, who isn’t.

Ignoring the ad hominem, I don’t see how that’s supposed to be an argument against what I said - it only highlights that the participants weren’t even randomly selected. If you’re cherry-picking participants, there’s even less reason to generalize the findings to the entire population.

As I mentioned in my other comment: you could just as easily run a study asking people to self-report whether they have a blind spot in their visual field, and everyone would say no - and everyone would be wrong.

Just because someone isn’t aware of something doesn’t mean it isn’t there. I’m not asking you to change your opinion - I’m simply saying I’m highly skeptical of it.