The "research" part of this assignment:
"Discuss a treatment used to enhance the social skills of individuals with autism spectrum disorders. You will need to conduct a literature search and identify a research article that has been published since 2005 that discusses a specific treatment."
You've done enough research for this class to be able to choose an appropriate database for this assignment. I'd choose a database that includes research in the field of psychology. (Is that hint enough?)
Identify the keywords that you need to search on. It's not too difficult, here.
Some ideas:
There are several ways to ensure you're choosing a research article:
OR