Originally published on May 14, 2016 on Wired by Michael Zimmer.
ON MAY 8, a group of Danish researchers publicly released a dataset of nearly 70,000 users of the online dating site OkCupid, including usernames, age, gender, location, what kind of relationship (or sex) they’re interested in, personality traits, and answers to thousands of profiling questions used by the site.
When asked whether the researchers attempted to anonymize the dataset, Aarhus University graduate student Emil O. W. Kirkegaard, who was lead on the work, repliedbluntly: “No. Data is already public.” This sentiment is repeated in the accompanying draft paper, “The OKCupid dataset: A very large public dataset of dating site users,” posted to the online peer-review forums of Open Differential Psychology, an open-access online journal also run by Kirkegaard:
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