A UK regulator is investigating whether Facebook broke data protection laws when it conducted a psychological study on users without their consent.
The test saw Facebook “manipulate” the news feeds of nearly 700,000 users to control which emotional expressions they were exposed to.
The Information Commissioner’s Office (ICO) said it planned to question Facebook over the study.
Facebook said it had taken “appropriate protections for people’s information”.
“We are happy to answer any questions regulators may have,” Facebook’s Richard Allen said in a statement.