Opinion poll in the context of "Survey methodology"

A referendum, plebiscite, or ballot measure is a direct vote by the electorate (rather than their representatives) on a proposal, law, or political issue. A referendum may be either binding, resulting in the adoption of a new policy, or consultive (or advisory), functioning like a large opinion poll.

Advocacy groups, also known as lobby groups, interest groups, special interest groups, pressure groups, or public associations, use various forms of advocacy or lobbying to influence public opinion and ultimately public policy. They play an important role in the development of political and social systems.

Motives for action may be based on political, economic, religious, moral, commercial or common good-based positions. Groups use varied methods to try to achieve their aims, including lobbying, media campaigns, awareness raising publicity stunts, polls, research, and policy briefings. Some groups are supported or backed by powerful business or political interests and exert considerable influence on the political process, while others have few or no such resources.

Survey methodology is "the study of survey methods".As a field of applied statistics concentrating on human-research surveys, survey methodology studies the sampling of individual units from a population and associated techniques of survey data collection, such as questionnaire construction and methods for improving the number and accuracy of responses to surveys. Survey methodology targets instruments or procedures that ask one or more questions that may or may not be answered.

Researchers carry out statistical surveys with a view towards making statistical inferences about the population being studied; such inferences depend strongly on the survey questions used. Polls about public opinion, public-health surveys, market-research surveys, government surveys and censuses all exemplify quantitative research that uses survey methodology to answer questions about a population. Although censuses do not include a "sample", they do include other aspects of survey methodology, like questionnaires, interviewers, and non-response follow-up techniques. Surveys provide important information for all kinds of public-information and research fields, such as marketing research, psychology, health-care provision and sociology.

Televoting (also telephone voting, phone voting, and call-in voting) is a method of decision making and opinion polling conducted by telephone. Televoting can also extend to voting by SMS text message via a mobile cell phone.

A poll tax, also known as head tax or capitation, is a tax levied as a fixed sum on every liable individual (typically every adult), without reference to income or resources. Poll is an archaic term for "head" or "top of the head". The sense of "counting heads" is found in phrases like polling place and opinion poll.

Head taxes were important sources of revenue for many governments from ancient times until the 19th century. In England, poll taxes were levied by the government of John of Gaunt in the 14th century and Charles II in the 17th century. In the United Kingdom a poll tax was levied by the government of Margaret Thatcher in the 20th century. In the United States, voting poll taxes (whose payment was a precondition to voting in an election) have been used to disenfranchise impoverished and minority voters (especially after Reconstruction).