The actual information about users collected included their username, age, gender, location, religious and astrology opinions, their number of photos, and more. The pair also collected the users' answers to the 2,600 most popular questions on the site. For the paper, Kirkegaard and Bjerrekær explored things such as whether it was possible to work out users' general cognitive ability from their answers. A third researcher, Oliver Nordbjerg, is also listed as a contributor on the site Open Science Framework.
"OkCupid is an attractive site to gather data from."
This OkCupid data, meanwhile, seemingly hasn't had any sort of anonymisation applied to it.Kirkegaard, one of the authors of the paper, told Motherboard in an email "Preferably I would like to wait until the heat has declined a bit before doing any interviews. Not to fan the flames on the social justice warriors." Since the publication of the paper earlier this week, he has uploaded a password protected version of the data. But it is still possible to access the open version, by clicking through the various revisions of the data listed on the publishing site, Motherboard found.Update: This story has been updated to reflect comment from OkCupid.
"The data can be used for deanonymization of individuals and very sensitive information, and they can't opt out either."