Mariella Frostrup and guests ask can you make your child smarter?
What effect will the 1992 Republican convention have on the opinion polls?
David Cowling looks at the track record of polls in previous British elections.
Exploring the past, present and future of opinion polling
We think we know what's true - but surveys often prove otherwise.
Biologist Steve Jones reflects on the legacy of the father of eugenics, Francis Galton.
Vice-presidential debate could sway public opinion on main candidate.
Josie Long presents stories of people testing their mettle.
Stephanie Calman talks to women with an intellectual mismatch in their relationships.
How a 'close contest' turned into a landslide.
Mary Beard tells the intriguing story of the history of exams.