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More or Less: Behind the Stats - Brain Food and Bacteria

There's not an obvious link between chocolate and Nobel prizes, but this did not stop news outlets around the world reporting the amount of chocolate a country consumes influences the number of Nobel prizes they will win. In many cases the scientific study was reported without question or comment. Ruth Alexander asks what this story tells us about the way the media reports scientific studies, and why the correlation between the two might be so strong. Also ? it's often said that chopping boards or dishcloths have many more bacteria than toilet seat but is this really true?

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Start the Week - Award-winning film director Kevin Macdonald

On Start the Week Andrew Marr talks to the award-winning director Kevin Macdonald whose films often focus on real events or people, from Touching the Void, to Marley. The filmmaker Roger Graef discusses the ethical issues in documenting real life. And the Indian writer Aman Sethi explores the margins of society with his study of the world of itinerant labourers in a Delhi market. Producer: Katy Hickman.

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More or Less: Behind the Stats - Voodoo polling? Predicting the US election

This week Ruth Alexander looks at the other winner the US elections. Blogger and pioneer of aggregated polling, Nate Silver, predicted the outcome of the vote in every state one better than 2008. Others who have tried similar methods have also done well. Is this the dawn of a new era of poll prediction or just luck? Also, what effect did Hurricane Sandy have on death rates in places it hit and how did they differ from a normal day.