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Page last updated at 08:17 GMT, Friday, 24 June 2011 09:17 UK

Why web personalisation could skew objectivity

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Information we see online is increasingly being tailored by filtered, personalised searches on search engines, automated recommendations from online bookstores and social networks whose algorithms only tell us what is happening to those friends we care about the most.

The information society can be as diverse as it likes but each of us is already cosseted within our own familiar, safe, predictable information cocoon, so online campaigner Eli Pariser argues in his new book The Filter Bubble.

Along with Evgeny Morozov, author of The Net Delusion, Eli Pariser joins Gareth Mitchell to debate the pros and cons of web personalisation.

Listen to more from this week's edition of Click from the BBC World Service

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