Filter bubbles in internet search engines

Help

An internet expert has published research saying we are all living in "filter bubbles", whereby corporations decide what each individual sees on the internet.

Eli Pariser says that companies monitor our behaviour and interests and give us corresponding search results even when we do not realise it.

Rory Cellan-Jones has tested the theory for Newsnight.

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.