Measuring Public Opinion - AP Government and Politics

Nonresponse bias can lead to errors. Occurs when certain groups are less likely to participate.

Sampling error is the difference between the sample result and the true population value. Natural variation between sample results and actual population.

Differing interpretations of survey questions by respondents. Ambiguous wording can lead to misunderstandings and errors.

An omnibus survey collects data on various topics for multiple clients. Combines multiple research projects to reduce costs per topic.

The public agenda is a list of issues that are perceived by the political community as meriting public attention. Determines which issues receive government and media attention.

A benchmark poll is the initial poll used to gauge support for a candidate or issue. Establishes baseline data before campaigns or initiatives begin.

The media informs the public and can influence opinions through coverage. Sets the agenda and frames how issues are understood.

A panel survey involves the same individuals at multiple points in time. Tracks attitude changes in the same respondents over time.

Demographic questions help to analyze how different groups respond. Enables analysis of how different subgroups view issues.

Random sampling gives each member of the population an equal chance of being selected. This method reduces bias and ensures representative results.

Nonresponse bias can lead to errors. Occurs when certain groups are less likely to participate.

A push poll is designed to influence rather than measure public opinion. Uses loaded questions to sway voters rather than measure opinion.

Tracking polls monitor changes in public opinion over time. Conducted repeatedly to show trends and shifting attitudes.

Exit polls survey voters immediately after they leave the polling station. Provides immediate feedback on voting behavior and decisions.

A quota sample is selected to ensure certain characteristics are represented. Uses predetermined quotas to match population demographics.

The bandwagon effect is when people adopt beliefs because others do. People follow perceived popular opinion rather than personal views.

Deliberative polling involves informed discussion before measuring opinion. Participants receive information before expressing their views.

A straw poll is an informal survey used to gauge public opinion. Often unscientific and not representative of the population.

Timing can affect results, especially if events influence opinions. Major events or news can temporarily shift public attitudes.

A sample is a subset of a population used to represent the whole. Allows researchers to study the whole without surveying everyone.

The margin of error indicates the range of accuracy in a poll's results. Usually expressed as plus or minus a percentage (e.g., ±3%).

A leading question suggests a particular answer to the respondent. Pushes respondents toward a specific answer through bias.

A Likert scale measures the degree of agreement with a statement. Uses numbered scales from strongly disagree to strongly agree.

Question wording can affect reliability. Biased or unclear questions can skew responses significantly.

A pollster designs and conducts polls to gather public opinion data. Professional who specializes in measuring public attitudes.

A probability sample is one in which every member of the population has a known chance of being selected. Allows for statistical calculations and confidence intervals.

Nonresponse bias occurs when individuals who do not respond differ from those who do. Creates skewed results when nonrespondents have different views.

A longitudinal study collects data from the same subjects over time. Tracks changes in attitudes and behaviors over time.

Polls are typically brief and for gauging opinion; surveys are more detailed. Polls focus on specific questions; surveys are comprehensive.