Need to know what constitutes a decent IA? Below are links to IAs with teacher comments. This is for you to understand the depth and breadth of the data you want to collect. Your IAs need to be between 9 - 12 pages. You should review these so that you have an idea of what I expect.
IAs are not easy and should not be simplistic. The packet I gave you contains basic research questions, but you have to modify them to IB standards. Some research on your part is required.