A multi-disciplinary database containing professional and peer-reviewed titles
Full-text archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health's National Library of Medicine (NIH/NLM)
If a psychological topic is up for debate or disputed, these databases can assist in locating resources that examine multiple opinions about the subject in order to reach a conclusion or hypothesis regarding best practices.
NOTE: Peer review article requirements can be met by selecting the "Academic Journals" link on the search results pages.