This blog post title is one of the best I've read in a long time:
It's possible that your stupidity will affect your ability to understand this post
I will let you read it yourself, and will only point out why I am putting this in a PER articles blog. The point is that students come to our questions with immense amounts of information about likelihoods of events, and, based on this article, their beliefs tinge how they read the questions we ask them. This is a major result, obvious in some ways, but subtle in others. What I'm getting at is shown in the insomnia/deafness graph, which I won't explain because you can go and read the article yourself.