Where do people derive their certainty, which seems to me largely misplaced?

That part seems to make sense, but I cannot rightly comprehend the confusion that follows.

Some psychology researchers are claiming it has become a model of human cognition? (Because it can imitate the way a psychology study participant answers psychology study questions?)

Other psychology researchers are disputing this by testing its reaction time and digit span memory? (Are they administering an iq test? A cranial nerves exam?)

Current HN post points to a different article, which points to that science article; perhaps the HN post’s link should be updated.