Correction for Kramer et al., Experimental evidence of massive-scale emotional contagion through social networks

PSYCHOLOGICAL AND COGNITIVE SCIENCES Correction for “Experimental evidence of massive-scale emotional contagion through social networks,” by Adam D. I. Kramer, Jamie E. Guillory, and Jeffrey T. Hancock, which appeared in issue 24, June 17, 2014, of Proc Natl Acad Sci USA (111:8788–8790; first published June 2, 2014; 10.1073/pnas.1320040111).

The authors note that, “At the time of the study, the middle author, Jamie E. Guillory, was a graduate student at Cornell University under the tutelage of senior author Jeffrey T. Hancock, also of Cornell University (Guillory is now a postdoctoral fellow at Center for Tobacco Control Research and Education, University of California, San Francisco, CA 94143).” The author and affiliation lines have been updated to reflect the above changes and a present address footnote has been added. The online version has been corrected.

The corrected author and affiliation lines appear below.

Adam D. I. Kramer^a,1, Jamie E. Guillory^b,2, and Jeffrey T. Hancock^b,c

^aCore Data Science Team, Facebook, Inc., Menlo Park, CA 94025; and Departments of ^bCommunication and ^cInformation Science, Cornell University, Ithaca, NY 14853

¹To whom correspondence should be addressed. Email: akramer@fb.com.

²Present address: Center for Tobacco Control Research and Education, University of California, San Francisco, CA 94143.