Prepare yourself for more effective and efficient searches by viewing these tutorials first.
For example, you are searching to explore if there has been any research on self driving cars in Psychology and how psychologists might be interested. Start with a KEYWORD (in this case a phrase) search "self driving cars" in the first search box.
When you click on the Search button, you retrieve over 300 articles. Scroll through the results until you find an article that uses your search keyword/phrase. In the example it is number four circled in red.
Link to the title of article 4, "Responsibility and the moral phenomenology..." The full record for the article is retrieved. Scroll down until you find the "Subject" listing, circled in red. The two Subject terms/phrases used by PscyINFO are "Automation" and "Motor Vehicles."
Go back to the "Advanced Search" form and enter the two new Subject term and phrase into the two search boxes, the use the drop-down menu to the right of each box and select "All subjects & indexing." Click on Search button.
Now you retrieve 51 article (as of 3/2018). This a a lot less but these will be specifically about self driving cars. From here you can browse the articles, see what researchers are studying and choose another keyword or subject term to add to your search as you focus on your interests.