An opinion poll is a survey used to gauge public opinion by collecting data from a sample population. The goal is to extrapolate general trends and opinions that represent the larger population within a certain degree of confidence. Pollsters are the individuals responsible for conducting these surveys and analyzing the data obtained. These polls are widely used to understand public sentiment on various issues and can influence decision-making in fields like politics and marketing.
In 1916, The Literary Digest correctly predicted Woodrow Wilson's election as president by conducting a national survey. This survey involved mailing out millions of postcards and counting the returns.
In 1936, The Literary Digest's experience highlighted the error resulting from non-representative samples. Their methodology led to a sample not representative of the population, contributing to inaccurate polling results.
In 1936, The Literary Digest's survey of 2.3 million voters incorrectly suggested that Alf Landon would win the presidential election, while Roosevelt was re-elected by a landslide. Research later attributed the error to participation bias and a non-representative sample.
In September 1938, Jean Stoetzel, after meeting Gallup, established IFOP (the Institut Français d'Opinion Publique) in Paris, marking the first European survey institute.
In the summer of 1939, Jean Stoetzel initiated political polls with the question "Why die for Danzig?" to gauge public support or dissent, in connection with Marcel Déat.
In 1945, Gallup's subsidiary in the United Kingdom accurately predicted Labour's victory in the general election, contrasting with most commentators who expected a Conservative win led by Winston Churchill.
In 1947, Louis Harris entered the field of public opinion by joining the Elmo Roper firm, later becoming a partner.
In 1947, the Allied occupation powers began establishing survey institutes in the Western occupation zones of Germany to better manage denazification efforts.
In 1948, the Allied occupation powers continued establishing survey institutes in the Western occupation zones of Germany to better manage denazification efforts.
In the 1948 US presidential election, major polling organizations like Gallup and Roper incorrectly predicted that Thomas Dewey would defeat Harry S. Truman. Truman won by a narrow margin.
In 1952, substantial polling errors occurred in the presidential elections, though the winner was correctly predicted, the extent of their winning margin was not.
In 1970, most polls failed to predict the Conservative election victories in the United Kingdom.
In February 1974, most polls failed to predict Labour's victory in the United Kingdom.
In 1976, Douglas Bailey assisted with Gerald Ford's presidential campaign. This was before tracking polls became popular and candidates had to guess what the audience thought.
In 1980, substantial polling errors occurred in the presidential elections, though the winner was correctly predicted, the extent of their winning margin was not.
In 1992, a Roper Organization survey on the Holocaust used a double-negative question which resulted in inaccurate findings. The question read "Does it seem possible or impossible to you that the Nazi extermination of the Jews never happened?" which indicated that 22% of respondents believed the Holocaust might not have happened. When reworded, only 1% expressed the same sentiment.
In 1992, most polls failed to predict the Conservative election victories in the United Kingdom.
In 1993, polls leading up to the New Zealand general election predicted the governing National Party would increase its majority. The preliminary results, however, showed a hung parliament. The official count saw National gain Waitaki to hold a one-seat majority.
In 1996, Petty and Cacioppo described the "cognitive response" theory, asserting that a voter's response to a poll may not align with their initial perception, leading to the creation of a "mental list" that reinforces or alters their opinion and voting behavior.
In 1996, substantial polling errors occurred in the presidential elections, though the winner was correctly predicted, the extent of their winning margin was not.
In the 1997 United Kingdom general election, Michael Portillo's constituency of Enfield Southgate was believed to be a safe seat but opinion polls showed the Labour candidate Stephen Twigg steadily gaining support, which may have prompted undecided voters or supporters of other parties to support Twigg in order to remove Portillo.
During the 2000 U.S. presidential election, a Gallup Organization tracking poll generated controversy due to its volatility. It initially showed Al Gore with an eleven-point lead, followed by a poll two days later showing George W. Bush ahead by seven points. The volatility was attributed to an uneven distribution of voters in the samples.
In 2000, substantial polling errors occurred in the presidential elections, correctly predicting the winner of the popular vote but not the Electoral College.
In 2003, only 2.9% of households were wireless (cellphones only).
In 2004, the issue of cell phone users was first identified as a potential source of error in polling, but it gained prominence only during the 2008 US presidential election.
In 2006, 12.8% of households were wireless (cellphones only).
In 2007, the Pew Research Center conducted studies on mobile phone users in the US, concluding that while cell-only respondents differed from landline respondents, these differences were not significant enough to alter general population survey estimates when weighted according to US Census parameters.
In 2008, during the US presidential election, polls that included mobile phones in their samples showed a larger lead for Obama, than polls that did not. This highlighted the impact of cell phone usage on polling accuracy.
In 2015, the director of the Levada Center stated that Russian poll results cannot be compared to those in democratic states due to the lack of political competition and the influence of state-controlled media.
In the 2015 election, virtually every poll predicted a hung parliament with Labour and the Conservatives neck and neck, but the actual result was a clear Conservative majority.
In 2016, during the U.S. primaries, CNN reported that the Democratic primary in New York was too close to call, based on exit polls. However, the vote count revealed that Hillary Clinton won the state by a significant margin, making the exit polls misleading.
In 2016, substantial polling errors occurred in the presidential elections, correctly predicting the winner of the popular vote but not the Electoral College.
Regarding the 2016 U.S. presidential election, evidence suggests that false stories spread throughout social media may have played a role in the outcome. These fake news stories tended to favor Donald Trump over Hillary Clinton.
In 2017, Herb Asher's chapter four discusses sample techniques, emphasizing the importance of probability sampling, statistical theory, sample size, and response rates in scientific polling.
In 2017, most polls predicted an increased Conservative majority, but the election resulted in a hung parliament with a Conservative plurality. Some polls correctly predicted this outcome.
In 2022, Russia enacted war censorship laws which led to the criminal case against Yury Kokhovets in March 2023 for participating in a street poll.
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