Survey methods are used to collect informative data in a wide range of scientific contexts. This Comment outlines how to ensure that a survey is fit for its intended purpose and to avoid the many ...

This study looks at how national public opinion polling in the United States changed from 2000 to 2022. It focuses on two aspects: the sample source(s) – that is, where the survey takers came from – ...

The course covers the fundamentals of the human-centered research process and prepares students to plan, design, and conduct their own studies. Students in this course will work alongside their ...

During the COVID-19 pandemic, social and behavioral data provided political actors and public health professionals with an empirical basis for guiding their actions in fighting the pandemic 1. In the ...

Pew Research Center designed this study to assess the current state of online survey sampling methods – both probability-based and opt-in – and determine their accuracy on general population estimates ...