Religion and Public Life Survey, 2003

Data Archive > U.S. Surveys > General Population > National > Pew Research Center > Summary


“Religion is a critical factor these days in the public's thinking about contentious policy issues and political matters. An increasing number of Americans have come to view Islam as a religion that encourages violence while a declining number say Islam has a lot in common with their own religion. The public remains divided over whether churches should stay out of politics, even as large numbers say they are comfortable with expressions of faith by political leaders. There also is evidence that next year's presidential vote may again provoke deep religious divisions over social issues, especially homosexual marriage” (Pew Forum). This survey was conducted by The Pew Forum on Religion and Public Life.

Data File
Cases: 2,002
Variables: 138
Weight Variable: WEIGHT
Data Collection
Date Collected: June 24, 2003 to July 8, 2003.
Funded By
The Pew Research Center for the People and the Press and the Pew Forum on Religion and Public Life
Collection Procedures
Telephone interviews conducted in English and Spanish under the direction of Princeton Survey Research Associates.
Sampling Procedures
All quotations taken from the Religion and Politics survey methodology available online at the website: http://www.people-press.org/2003/07/24/religion-and-politics-contention-and-consensus/.

“The sample for this survey is a random digit sample of telephone numbers selected from telephone exchanges in the continental United States. The random digit aspect of the sample is used to avoid ‘listing’ bias and provides representation of both listed and unlisted numbers (including not-yet-listed). The design of the sample ensures this representation by random generation of the last two digits of telephone numbers selected on the basis of their area code, telephone exchange, and bank number.

“The telephone exchanges were selected with probabilities proportional to their size. The first eight digits of the sampled telephone numbers (area code, telephone exchange, bank number) were selected to be proportionally stratified by county and by telephone exchange within county. That is, the number of telephone numbers randomly sampled from within a given county is proportional to that county's share of telephone numbers in the U.S. Only working banks of telephone numbers are selected. A working bank is defined as 100 contiguous telephone numbers containing one or more residential listings.

“The sample was released for interviewing in replicates. Using replicates to control the release of sample to the field ensures that the complete call procedures are followed for the entire sample. The use of replicates also insures that the regional distribution of numbers called is appropriate. Again, this works to increase the representativeness of the sample.

“At least 10 attempts were made to complete an interview at every sampled telephone number. The calls were staggered over times of day and days of the week to maximize the chances of making contact with a potential respondent. All interview breakoffs and refusals were re-contacted at least once in order to attempt to convert them to completed interviews. In each contacted household, interviewers asked to speak with the ‘youngest male 18 or older who is at home.’ If there is no eligible man at home, interviewers asked to speak with ‘the oldest woman 18 or older who is at home.’ This systematic respondent selection technique has been shown empirically to produce samples that closely mirror the population in terms of age and gender” (Pew Forum).
Principal Investigators
The Pew Research Center for the People and the Press and the Pew Forum on Religion and Public Life
Related Publications
Complete summary information is available at the website: http://www.people-press.org/2003/07/24/religion-and-politics-contention-and-consensus/.
Notes on Weighted Data
“Non-response in telephone interview surveys produces some known biases in survey-derived estimates because participation tends to vary for different sub-groups of the population, and these sub-groups are likely to vary also on questions of substantive interest. In order to compensate for these known biases, the sample data are weighted in analysis.

“The demographic weighting parameters are derived from a special analysis of the most recently available Census Bureau's Current Population Survey (March 2002). This analysis produced population parameters for the demographic characteristics of households with adults 18 or older, which are then compared with the sample characteristics to construct sample weights. The analysis only included households in the continental United States that contain a telephone. The weights are derived using an iterative technique that simultaneously balances the distributions of all weighting parameters” (Pew Forum).