When political polls are aggregated together, that can make the results misleading.
Policymaking is no longer based solely on what a party stands for. Now, it also matters how a decision is going to play in the opinion polls – and that's a problem for our political system.
How do you know whether to trust a poll? Look carefully at how it was conducted – and examine your own biases.
Results showing a large number of Leave constituencies now back Remain caused great excitement but don't necessarily mean major change is on the way.
Research has shown that UKIP polling is driven by media coverage rather than the reverse.
Russian meddling has shaken Americans' faith in democracy. But public discontent after a scandal is hardly new. Trust in government began to erode under Nixon, and it's mostly worsened since then.
Most Leave voters would rather lose Northern Ireland than drop Brexit, reflecting a longstanding indifference.
On June 7, Ontario may have a new premier, and the latest public opinion polls suggest it could be Andrea Horwath. She would lead just the second NDP government in Ontario.
A scholar offers advice to voters who are leery of polling after the 2016 election.
Most surveys are consistent in finding there is a substantial minority of the view that immigration is too high, but not a large majority.
The strong US economy has improved Donald Trump's ratings in the last month.
In both Australian and overseas elections held in 2017, the left generally performed better than expected.
Survey shows Remain voters more opposed to a hard border than Leave voters.
Polls show a clear majority support assisted dying in Britain – but it depends on how the question is asked.
In the marriage equality debate as in any other, media outlets must balance the right to freedom of speech with the balance of evidence.
How much did social media have an impact on the campaigns of Theresa May and Jeremy Corbyn?
The pollsters have had another bad year – and it may be because they were so worried about repeating the mistakes of 2015.
Hitting a moving target is hard, and young people don't always do what's expected.
The exit poll published at 10pm suggests the Conservatives could fall short of a parliamentary majority. Is it to be believed?
If the 2017 polls are to get the election right, they have to nail one variable in particular: turnout among the young.