You can search the PSU Library Catalog for the full text of articles. Type or copy and paste the article title into the search box.
Look for the correct article from your search results. You will see you will see either a green "Online Access" link or an orange "Find & Request" link.
For articles with a green "Online Access" link, click the link, then follow the provider link to the full text.
Sometimes there are multiple links; they all should take you to the article, but if one doesn't work, try another.
This video describes how to quickly access a full text article from a citation using Google Scholar.