Sample Design

The AmericasBarometer is grounded in a rigorous sample design to ensure high-quality, representative data. Each survey is based on a national probability sample of voting-age adults, with face-to-face interviews conducted in respondents’ homes (online in Canada and the United States).  In some cases oversamples are collected to allow precise analysis of opinion within subnational regions.

Standardized protocols across countries and rounds—including in-country pretests, electronic data collection, and robust weighting procedures—ensure consistency, accuracy, and comparability over time and across contexts.

You can find technical information—including sample design details, fieldwork dates, and design effects—for each AmericasBarometer survey round here.