“Pass or fail” is too simple a story for the viva. Two outcomes plants the idea that both have equal likelihood. Even when a candidate knows that’s not the case, having a binary outcome allows for one (the negative one, of course!) to rest heavily in the mind.
There are many outcomes – minor corrections, major corrections, resubmission, no corrections… If we tell the story that the viva is pass or fail, the real outcomes confuses the matter. I’ve had many candidates ask me “Is major corrections a pass or not?” because they think the viva is only pass or fail.
Check the outcomes at your institution. Check what they mean. Focus on the fact that most people get some corrections to do, and that’s not a problem. They’ve not failed.
“Pass or fail” is a nice, simple story, but it’s not accurate. There are many outcomes, not just two, and most of them are a pass. There are conditions to the pass, and there are reasons why candidates get those outcomes. Find out why. Learn more. Understand the situation.
Not “pass or fail” but “pass and why”…