Psychological science (2015) - Comment
pubmed: 25605707  doi: 10.1177/0956797614557867  issn: 0956-7976  issn: 1467-9280 

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Johannes C. Eichstaedt, Hansen Andrew Schwartz, Margaret L. Kern, Gregory Park, Darwin R. Labarthe, Raina M. Merchant, Sneha Jha, Megha Agrawal, Lukasz A. Dziurzynski, Maarten Sap, Christopher Weeg, Emily E. Larson, Lyle H. Ungar, Martin E. P. Seligman