Some clues that will help you find the original article are:
Using the article, "Study shows 'bilingual advantage,'" as an example, we are able to gather evidence that Diane Poulin-Dubois is on e of the authors of th epsychological study that the newspaper article references. The article also notes that the findings were published in a recent issue of the Journal of Experimental Child Psychology. The article does NOT mention the title of the study.
Using information available, we can see if the Library has a copy of this study.
This publication is available through the Library's ScienceDirect subscription.
Once you enter the ScienceDirect database, you can then search by author. Enter the author, "Poulin-Dubois," and search. This search gives us two results, but only one of the articles are from 2011, the year that the newspaper article was published.
Click on the PDF link to access the entire article.
Additional ways to search for the original article include: