Employees may soon be forced to wear headsets that track thoughts and monitor productivity, engagement and even when staff want to complain to their boss.

A mind-reading device known as an electroencephalogram (EEG) can be fitted to a persons scalp and tracks the electrical signals produced by the brain.

Some companies have started forcing workers to wear them and combining the readings with artificial intelligence to dissect their thoughts.

Nita Farahany, a professor of law and philosophy at Duke University, gave a TedTalk on the topic and revealed she was concerned that this may cost people their jobs.

The headsets are already being used to track alertness, productivity and mental state in China.