There are 5 central concepts that are important to grasp, in order build an effect search strategy for any article oriented database:
For some research toptics, the difference in the number of articles retrieved between these two simple options could be 4 to 1!
When you know upfront that you have to find resources that meet certain criteria, it is always best to set up those restrictions at the beginning of your search process, rather than after the fact.
This is relatively easy to do with the PsycInfo database, since all of the necessary options are offered to you, directly from the ADVANCED SEARCH SCREEN:
#1: Peer reviewed: This is just a simple check box, but it is relatively small sized. Click on it, so that it displays a "check mark". Now move onto your second option.
#2: English language: This is also a simple check box, and it is also relatively small sized. Click on it, so that it displays a "check mark". Note that you do NOT have to scroll through the long list of available languages. The ENGLISH option is available to you as the check box. Now move onto your third option.
#3: Human: This is option is found inside the section called "Population". Click on the line called "Human". Now you can move to your last option.
#4: Empirical study: This is option is found inside the section called "Methodology". Click on the line called "Empirical Study".
Now you are ready to actually execute your search! There are 2 search buttons on the screen... One is at the far bottom right fo the screen, in a grey colored box, the other "Search" button is near the far top of the screen, in a dark green button. Either button will do!