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Frequently Asked Questions

How are questions determined for the poll?

Questions for the SLU/YouGov Poll can be broken down into three overlapping categories. First, there is a “core” set of questions that will be asked on every survey in order shed light on how Missourians’ opinions changed over time (e.g. their perceptions of the economy or crime). Second, there are questions that directly contribute to Saint Louis University faculty’s research agendas. Third, there are questions aimed to be relevant to current events or the immediate needs of the Missouri community. In recent polls, this includes questions on the COVID-19 pandemic and race relations. To build these sets of questions, the SLU Poll directors actively seek input and feedback from across Saint Louis University and encourage the Saint Louis University community to approach the directors with suggestions.

How can I place a question on the SLU/YouGov Poll?

The SLU Poll team welcomes recommendations for questions to ask on future polls. To suggest a question, contact SLU Poll Director, Dr. Steven Rogers.  Please note, space may be limited on polls.

How can I conduct my own analyses of SLU/YouGov Poll Data?

Within six months of each survey, individual level responses will be posted to the SLU Poll web site Data Archive.

Who answers questions to the SLU/YouGov Poll?

Respondents to the SLU Poll are self-reported, likely voters in the state of Missouri drawn from a sample of respondents recruited by YouGov. Most YouGov panelists are individuals who have made an account on yougov.com to receive periodic notifications about new surveys. Others are recruited live from online advertisements or other survey providers. YouGov respondents are compensated by points for taking each survey. Respondents can exchange accumulated points for gift cards and other prizes.

What is the sampling frame?

For the October 2020 survey, YouGov interviewed 1,063 respondents with an oversample of African-American respondents who were then matched down to a sample of 931 likely voters to produce the final dataset. The full set of survey starts were matched to a sampling frame on gender, age, race, and education. The frame was constructed by stratified sampling from the Missouri registered voter portion of the 2018 Current Population Study voter supplement with selection within strata by weighted sampling with replacements.

How are survey results weighted?

The matched cases were weighted to the sampling frame using propensity scores. The matched cases and the frame were combined and a logistic regression was estimated for inclusion in the frame. The propensity score function included age, gender, race/ethnicity, and years of education. The propensity scores were grouped into deciles of the estimated propensity score in the frame and post-stratified according to these deciles. The weights were then post-stratified on 2016 Presidential vote choice, and a two-way stratification of gender and age (4-categories) from the Missouri voter file to produce the final weight.

How is the SLU Poll funded?

In 2020, Saint Louis University/YouGov poll are funded by a grant from the Saint Louis University Research Institute’s Big Idea’s competition. The 2021 SLU/YouGov Poll will be funded through support from the Saint Louis University School of Education. The SLU/YouGov Poll additionally receives support from individual SLU researchers who lease time on the survey instrument for their independent research projects.