Start here for one selected bit of serious research and loads of references.
Take serious what Phantom Lurker writes about the danger of data selection, respectively selective production of data (intriguingly similar in style to another 'research' description from you in a totally different thread; you later said it was only play).
If your teacher knows about your plans of data gathering so far and agrees with them he may be a nice person, a likable man, even an excellent teacher on other topics but he ain't a good teacher on how to do sound empirical research.

Wolfgang