Intro to Psych - Research Project

PubMed:  PubMed is a free resource supporting the search and retrieval of biomedical and life sciences literature with the aim of improving health–both globally and personally.

The PubMed database contains more than 30 million citations and abstracts of biomedical literature. It does not include full-text journal articles; however, links to the full text are often present when available from other sources, such as the publisher's website or PubMed Central (PMC). (Description from PubMed site)

Science Direct: Open access journal articles covering multiple subjects in science (account creation may be necessary) 

PLOS ONE: Full-text open access articles covering multiple subject areas

MDPI: Includes approximately 420 peer-reviewed journals and nine conference journals

Frontiers: 221 OA Journals