Several of the adjustment approaches used in this study require a dataset that is highly representative of the U.S. adult population. This dataset essentially serves as a reference for making the survey at hand (e.g., the online opt-in samples) more representative. When selecting a population dataset, researchers typically use a large, federal benchmark dataset such […]
This study, sponsored by Pew Research Center, used online opt-in survey data collected by three commercial vendors. Each vendor provided their own sample and administered the survey themselves, based on a common questionnaire. While no vendor makes the claim that that these are probability-based samples, they are intended to represent the noninstitutionalized U.S. adult population, […]
Historically, public opinion surveys have relied on the ability to adjust their datasets using a core set of demographics – sex, age, race and ethnicity, educational attainment, and geographic region – to correct any imbalances between the survey sample and the population. These are all variables that are correlated with a broad range of attitudes […]
Predictions from experts about truth and misinformation online in 2027, from @pewresearch and @ImagineInternet.
