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Methodology Blog

Explore Gallup's research.

Methodology Blog

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

Methodology Blog

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

Methodology Blog

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

Methodology Blog

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

Methodology Blog

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

Methodology Blog

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

Methodology Blog

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

Methodology Blog

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

Methodology Blog

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