I am really stuck on what to do as my chosen question. I have to write 2000 words about my subject and I would like to do it on either sport or psychology please can you think of some ideas for my EPQ.
The point of the qualification is to choose something that you would be willing to research independently and do a report on. What type of sports do you enjoy and actively follow? If you like football, investigate racism, or any other problem/controversial subject within the sport. The recent FIFA scandal, for example -- you could write a report on how the scale and popularity of football, and concurrently the largest organization within the sport has lead to some executives becoming complacent, assuming they can exploit the popularity of the sport for their own, fraudulent gain.
As for psychology.. well, it's a huge bloody subject!
Look at the Wikipedia page for it: https://en.wikipedia.org/wiki/Psychology
What you could do is click on the links in the left-hand side of the page. Experiment with sub-disciplinary components of psychology. See which ones you like. Make a short-list of the ones which most intrigue you, taking into account the viability of using it for an EPQ.
For example, by following a few links on the Wikipedia page, I ended up here: https://en.wikipedia.org/wiki/Cognitive_dissonance
I've heard of that phrase before but I never knew what it meant, until now. From this, I could write an EPQ cognitive dissonance itself. Or, I could apply it to a context and try to ask a question and propose a solution answer. That's the beauty of it -- it's all up to you!
An example title: "What is Cognitive Dissonance?"
Or, you could use this idea in a specific context, like religion.
Example title: "Why birth-given religion is the quintessential form of cognitive dissonance"
Those are pretty terrible examples, but I'm not the one doing an EPQ. Good luck, and remember -- the World's huge, and there's a lot to talk about.
Maybe to do with the aerodynamics?