The Media, Opinion Polls and Their Influence on UK Elections
The media, national newspapers, broadcast news and, increasingly, social media, and opinion polls both shape how UK elections are fought and understood, but in different ways.
Before you start
Make sure you're comfortable with these topics first:
Method
- Learn the legal difference between the press and broadcasters in the UK: newspapers can openly support a party or take a partisan editorial line, while broadcasters, e.g. the BBC, ITV, Sky News, are under a legal duty of due impartiality in their news coverage.
- Learn the historical pattern of UK press partisanship, including that most national tabloid and mid-market titles have tended to lean towards the Conservative Party over time, and be able to name at least one example.
- Learn how opinion polls work in outline: a sample of voters is surveyed and weighted to try to represent the wider electorate, and the result is reported with a margin of error.
- Learn a specific, real case where opinion polls were shown to be inaccurate, such as the 2015 general election, where most published polls underestimated the Conservative Party's eventual lead over Labour.
- Learn the debate over whether polls simply measure opinion or can actively shape it, through effects such as a 'bandwagon effect' (voters moving towards a party shown as likely to win) or a 'boomerang effect' (voters moving away from a party shown as likely to win, or turning out to stop it).
- Learn how social media and digital targeting have changed campaigning, including the use of targeted online advertising, and be aware of the 2016 Cambridge Analytica data-use controversy as a real example of concern over how personal data was used to target political messaging.
- For 'assess'/'evaluate' questions on media or poll influence, weigh evidence that they shape voters' views against evidence that voters' pre-existing views shape what media they choose, rather than assuming media influence works only in one direction.
Worked example
Before a general election, published opinion polls give Party A an average lead of 6 percentage points over Party B. On election day, Party A actually wins by only 1 percentage point. Calculate the size of the polling error, and explain one possible reason why polls can be wrong by this much.
- State the polls' predicted gap: Party A was shown 6 percentage points ahead of Party B.
- State the actual result: Party A won by 1 percentage point.
- Calculate the polling error: 6 - 1 = 5 percentage points, so the polls overstated Party A's lead by 5 percentage points.
- Give a possible reason: pollsters may have used a sample that was not fully representative of who actually turned out to vote, for example over-representing groups more likely to support Party A or under-representing late deciders.
- Note the wider lesson: because polls rely on a sample and on assumptions about turnout, even a well-conducted poll carries a margin of error, and this example shows why an averaged 6-point poll lead cannot be treated as a certain result.
Practice questions
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Q1State one legal difference between UK newspapers and UK broadcasters in how they can cover politics.Show answer
Answer: Newspapers can openly support a political party and take a partisan editorial line, while broadcasters such as the BBC are under a legal duty to remain impartial in their news coverage.
Q2Which party have most UK national newspapers historically tended to support?Show answer
Answer: The Conservative Party.
Q3What is a 'bandwagon effect' in relation to opinion polls?Show answer
Answer: The theory that some voters are more likely to support a party once polls show it is likely to win, because they want to back the winning side.
Q4What happened to UK opinion polls at the 2015 general election?Show answer
Answer: Most published polls significantly underestimated the Conservative Party's eventual lead over Labour, a widely studied polling failure.
Q5What is a 'margin of error' in an opinion poll?Show answer
Answer: A statistical range around a poll's headline figures that reflects the uncertainty from surveying only a sample of the population rather than every voter.
Q6What was the Cambridge Analytica controversy of 2016, in outline?Show answer
Answer: A scandal in which personal data harvested from social media users was reportedly used, without proper consent, to build targeted political advertising, raising concerns about how digital campaigning uses personal data.
Q7Give one reason opinion polls can be inaccurate, other than sampling error.Show answer
Answer: Voters may change their mind after being polled, or may not turn out to vote as they told the pollster they would, differential turnout.
Q8Give one way social media has changed UK election campaigning compared with relying only on newspapers and broadcast media.Show answer
Answer: It allows parties to target specific groups of voters directly with tailored online adverts, rather than relying only on a broad newspaper readership or TV audience.
Exam-style questions
Written in the style of a A Level Politics exam paper, with a full mark scheme.
Using an example, explain one way opinion polls can influence the conduct of an election campaign.
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'The media has more influence over how people vote than opinion polls do.' Analyse and evaluate this statement.
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See real A Level Politics past-paper questions, with official mark schemes →
Free printable worksheet
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