Cohen worked with other researchers from San Diego State University, The Santa Fe Institute and The Monday Campaigns, a nonprofit public health organization, on the study. Funding for the study came from The Monday Campaigns and the Johns Hopkins Bloomberg School of Public Health.
The study, published in the Journal of the American Medical Association, Internal Medicine, involved looking at Google searches around the world that were made between 2008 and 2012. Researchers examined searches in six languages: English, Spanish, Chinese, French, Portuguese and Russian. They analyzed query volumes in proportion to other searches.
For English searches in particular, people searched about quitting smoking 11 percent more on Mondays than on Wednesdays, 67 percent more on Mondays than on Fridays, and 145 percent more on Mondays than on Saturdays.