Dictionaries, handbooks, and encyclopedias are a good starting place for psychology research, especially if you're not sure where to begin or overwhelmed by the choices. These resources can provide a scholarly summary of a particular subtopic in psychology; the terminology, names, and important works in that area (it's basically the academic version of browsing Wikipedia). By choosing a topic from one of these resources, you can be sure there is a sufficient pool of research to draw from for your project.