How we run polls

Adults aged 18 and over in each market we cover: the US and the UK. Everyone answers online, on a phone or a computer, through a research panel of people who have agreed to take surveys. Each person answers a poll once.

We keep questions short and neutral and offer “Don’t know” where it fits. Where the order of the answers could sway people, we show them in a random order. Every poll page shows the exact wording we used.

Every poll page shows the date we asked the question, so you always know how fresh a result is.

Before we publish a poll we check every set of answers. We take out people who rush through, give the same answer to everything, contradict themselves or take part twice.

Weighting makes the people we asked match the population by age, gender, region and more. Each poll page says whether its results are weighted. How we weight.

Every poll can be split by groups such as age, gender, income and how people voted. Groups under 50 people are marked * and should be read as a rough guide; groups under 30 are not shown.

For questions about politics we show the full wording, the date, who we asked and whether and how the results were weighted, so anyone can check the numbers.

If you think we have made a mistake, tell us. We will check it and correct the page.