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Methodology Blog

Explore Gallup's research.

Gallup recently tested the value of including Quick Response Codes in survey invitations.

Gallup and Walk Free developed a methodology to estimate the prevalence of modern slavery using an innovative modeling approach.

Cellphone scamming and blocking technologies present a new challenge to survey researchers.

Researchers who are considering mixing survey research modes or contemplating a transition to a new method should be especially mindful of mode effects.

Telephone survey response rates are down across the survey research industry, requiring researchers to explore alternatives that supplement phone surveys.

Gallup research shows that post-paid incentives are highly effective in web-based surveys.

Survey respondents probed after an initial "don't know/refused" response give systematically different answers than those not probed for a response.

Text messaging is widely used in the U.S., but it appears to have significant drawbacks as a primary way to reach survey respondents.

Hear directly from Gallup's methodologists about our latest experiments and recommendations for conducting public opinion research.