Methodology

This page contains information about how we conduct our polls, general issues in election polling and survey methodology, answers to basic questions, and links to Center reports and commentaries that examine methodological issues in more detail. Most of our national surveys are conducted by randomly dialing landline and cell phone numbers in the continental United States. About Our Survey Methodology in Detail

Methodology Topics
Election Polling

Election Polling
Pre-election polling is a rare chance for pollsters to "check their work" by measuring how well their polls matched election outcomes.

Sampling

Sampling
Most of our national surveys of the general public are conducted by telephone using a random digit sample of listed and unlisted telephone numbers in the continental United States.

Collecting Survey Data

Collecting Survey Data
Survey researchers employ a variety of techniques in the collection of survey data. In this section, we have chosen the reports and commentaries that best highlight these methods.

Questionnaire Design

Questionnaire Design
Question design is often thought to represent the art of survey research but there is also plenty of science involved. What are the pitfalls and best practices of survey design?

Latest Methodology Reports

July 9, 2009
Accurately Locating Where Wireless Respondents Live Requires More Than A Phone Number

Figure

The mobile nature of wireless phones creates a significant problem for geographic sampling and analysis. This problem is exacerbated by the fact that the wireless-only are more geographically mobile than those with landline phones.

More Methodology Reports

June 25, 2009
Perils of Polling in Election '08

Figure

Despite such challenges as a growing wireless-only population, possible racially-related response bias and greater-than-usual difficulties in forecasting turnout, polllsters' methods were evidently adequate to the task.