Confidence Based Questions

I would like to create case based, multiple choice questions where there is the ability to rate how confident a user is with their response out of 100. My thought is to have sliders that would adjust to rate how confident one is with their answer. So if the question had 4 options and someone was 70% confident the answer was B, then the sliders for A,C & D would move down to 10%. The final analysis would be show statements such as "For questions where you were 80+% confident, 8 out of 10 were correct. I have been trying to find a way of making Storyline do this but am having no luck. Does anybody know how to do this or perhaps another way/program that may be able to?