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.
