Scholarship assumes previous knowledge.
Scholarly articles and books are not a good source of information for defining and explaining the basics of social psychology concepts.
Use the APA Dictionary of Psychology linked below to help you get started. It is a more reliable source than Wikipedia!
APA Dictionary of Psychology by The sources in this box are a good place to go if you need more than a definition, but less than scholarship.
A little background information can be very helpful in understanding the narrow and complicated topics explored in scholarship.
Sample subject encyclopedias on psychology:
The Corsini Encyclopedia of Psychology by 
The SAGE Encyclopedia of Psychology and Gender by 