NZ Labour had been polling in the mid-20s before Jacinda Ardern became its leader and eventually won the 2017 election.
In both Australian and overseas elections held in 2017, the left generally performed better than expected.
The Irish border question: central to Brexit negotiatons.
Niall Carson/PA Wire
Survey shows Remain voters more opposed to a hard border than Leave voters.
Noel Conway, whose legal challenge to the UK law on assisted dying has been rejected.
Stefan Rousseau/PA Archive
Polls show a clear majority support assisted dying in Britain – but it depends on how the question is asked.
Cory Bernardi’s views on same-sex marriage may be crude and ignorant, but the media are nonetheless obligated to report how he uses his power.
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?
Few saw Labour’s result coming.
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.
PA/ Andrew Matthew
The exit poll published at 10pm suggests the Conservatives could fall short of a parliamentary majority. Is it to be believed?
Let’s find out.
If the 2017 polls are to get the election right, they have to nail one variable in particular: turnout among the young.
Quite a surprising result for this man.
With just a week until the vote, the polling agency has thrown a cat among the pigeons. Here's how to understand the poll everyone is talking about.
Some pollsters have updated their models since the 2015 election.
Polling is difficult – and everyone except pollsters overestimates how accurate polls are.
Protestors gathered in D.C. on April 29 for People’s Climate March.
The White House is deciding whether or not to stay in the Paris climate agreement. But a large majority of Americans – including Trump voters – want the U.S. to participate and lead.
Are we relying too much on interviews with voters instead of polling?
They were way off in 2015 and for the forthcoming election in June it's worth knowing why.
Where are the people really going?
Is Trump up or down? Will the public vote yes or no? Who will win the election? A mathematician's guide to understanding polls in the media.
Why are so many Trump supporters spoiling for a fight?
AP Photo/John Minchillo
A unique poll from Penn State’s McCourtney Institute for Democracy tracks how the nation is feeling.
A protester against President Trump’s immigration policy and a Trump supporter in New York City.
Data since 1950s show Americans have always been wary of refugees. A public opinion expert explains current attitudes toward Syrian refugees and what it means for building consensus on policy.
Liberal MP Ian Goodenough is chairing a parliamentary inquiry into freedom of speech in Australia.
Neither Galaxy Research nor the Institute of Public Affairs think-tank discussed the most interesting data they garnered from polling on free speech and reform to Section 18C.
Like wearing psychological blinders.
Horse image via www.shutterstock.com.
It's human nature to notice or search out information that supports what you already believe and discount or avoid data to the contrary. The problem comes in when you don't recognize this bias is in play.
What will polling look like in the future?
Person taking survey via shutterstock.com
Pollsters must be as accurate as possible. How will they address the challenges revealed in the 2016 election, and other changes in the coming years?