What we learned about online nonprobability polls | Pew Research Center


What do you hope the survey world will take away from this study?

Our results suggest that more elaborate adjustments help to improve accuracy and that not weighting your data – a common practice among online sample vendors – is not a great idea. To advance this survey approach, our study suggests that you need adjustments across a large range of variables, rather than the narrow set often used when weighting traditional, probability samples.