Learn Before
Analyze this case study by drawing direct parallels to the 1936 presidential election poll between the Literary Digest and George Gallup. Diagnose the primary methodological flaw in the subscription-list survey, explain how the university team's approach mirrors Gallup's scientific methods, and determine which poll is scientifically more credible.
Case context: A modern polling group wants to predict the outcome of a state senate election. They send out 2 million digital survey ballots to individuals on an expensive investment newsletter subscription list. Meanwhile, a university research team conducts a survey of 1,500 randomly selected registered voters across all income brackets. The subscription-list survey predicts Candidate A will win in a landslide, while the university team predicts Candidate B will win.
Question: Analyze this case study by drawing direct parallels to the 1936 presidential election poll between the Literary Digest and George Gallup. Diagnose the primary methodological flaw in the subscription-list survey, explain how the university team's approach mirrors Gallup's scientific methods, and determine which poll is scientifically more credible.
Sample answer: The subscription-list survey suffers from severe selection bias, directly paralleling the Literary Digest's 1936 straw poll, because its sample is drawn from an investment newsletter, which overrepresents wealthier individuals. The university team's approach mirrors George Gallup's scientific methods because it uses a much smaller, representative sample that spans all income levels, including less wealthy individuals. Therefore, the university team's poll is scientifically more credible because representative sampling is far more important for accuracy than raw sample size.
Key points:
- Diagnose the selection bias in the subscription-list survey (overrepresenting wealthier individuals).
- Compare the subscription-list survey to the Literary Digest's biased 1936 straw poll.
- Contrast the massive, biased sample with the smaller, representative sample of the university team.
- Determine that the university team's poll is more credible due to scientific survey methodology.
Rubric: The analysis must diagnose selection bias in the subscription survey, link it to the Literary Digest's methods, explain how the university team's inclusion of all income brackets mirrors Gallup's scientific sampling, and conclude that the smaller, representative poll is more credible.
0
1
Tags
KPU
Research Methods in Psychology - 4th American Edition @ KPU
Related
Survey Research Center at the University of Michigan
George Gallup’s 1936 presidential election prediction is a landmark case in survey research. Why did Gallup’s poll produce a more accurate result than the Literary Digest poll, despite Gallup using a significantly smaller sample size?
Match each of George Gallup's specific methodological choices from the 1936 election prediction to the psychological research principle it best demonstrates.
Arrange the steps George Gallup followed during the 1936 election cycle to reflect the logical progression of his scientific challenge to traditional straw polling methods.
Based on the methodological outcomes of the 1936 presidential election, it is a scientifically sound evaluation to conclude that a large sample size is an effective substitute for a representative sampling methodology.
Prior to the 1936 election, what action did George Gallup take to publicly challenge the 'Literary Digest' poll?
George Gallup’s 1936 election prediction demonstrated that utilizing scientific sampling principles allows a researcher to accurately identify why a massive, non-scientific poll will fail before the results are even known.
In the 1936 U.S. presidential election, pollster _____ successfully predicted Franklin Roosevelt's landslide victory by using scientific survey methods with much smaller samples than his competitors.
Imagine you are a researcher designing a survey to gauge public opinion on a new local tax policy. Wealthy residents are highly accessible via online directories, but less wealthy residents are not. Explain how you would apply the survey methodology of George Gallup from the 1936 presidential election to design a sampling strategy that avoids selection bias.
Analyze this case study by drawing direct parallels to the 1936 presidential election poll between the Literary Digest and George Gallup. Diagnose the primary methodological flaw in the subscription-list survey, explain how the university team's approach mirrors Gallup's scientific methods, and determine which poll is scientifically more credible.
Evaluate the scientific validity of the claim that a poll with a sample size of millions of people is guaranteed to be more accurate than a poll with a sample size of a few thousand. Support your evaluation using the outcome of the 1936 presidential election polls.