I kinda wish that there was a simple way to quickly see if a paper has been peer reviewed. Findings like these are interesting observations at best until they've been replicated and controlled by independent parties... Still an interesting study. :)
This was published in the Journal of Personality and Social Psychology, an APA Journal. You can find their peer review process here (under "The Peer Review Process"): http://www.apa.org/pubs/authors/new-author-guide.aspx
One of my favourite (peer reviewed) articles ever is: http://journals.plos.org/plosmedicine/article?id=10.1371/jou...
It would be great to see more summaries of papers from trustworthy sources. For computer science there is The Morning Paper [1] but I don't know what there is for other fields.