Ideas for heuristics and biases research topic?

Hey Less Wrong,

I’m currently taking a cognitive psychology class, and will be designing and conducting a research project in the field — and I’d like to do it on human judgment, specifically heuristics and biases. I’m currently doing preliminary research to come up with a more specific topic to base my project on, and I figured Less Wrong would be the place to come to find questions about flawed human judgment. So: any ideas?

(I’ll probably be using these ideas mostly as guidelines for forming my research question, since I doubt it would be academically honest to take them outright. The study will probably take the form of a questionnaire or online survey, but experimental manipulation is certainly possible and it might be possible to make use of other psych department resources.)