You can use encyclopedias as catalogs of topics. To find specialized encyclopedias in Purdue's catalog, click on "Advanced Search" on the Libraries' homepage.
Then key in:
in top box: | encyc* |
in second box: | subject area, e.g. nanotechnology |
or | food |
or | crim* (for crimes, criminology, etc.) |
These books provide informed pro/con and point/counterpoint viewpoints on a variety of controversial research topics.
Sometimes choosing a topic can be the hardest part of a research paper. Using encyclopedias or online reference tools can help you get the big picture of a topic so you can then narrow your focus to what really interests you.