Wondering how many people in the United States have a smartphone? If you poll 20 people on the street, your survey won’t be representative of the entire American population. But if you just want to ...

Survey questions raising concerns in middle schools: *The last time you engaged in sexual activity, did you use one of the following to protect yourself from sexually transmitted diseases (STDs)?

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 ...

© CBS Dissertation on the causes of nonresponse and how these insights can be used to use the budget for fieldwork efficiently. This dissertation discusses the ...

Targeting matters most. Surveying the wrong audience can lead to misleading data and poor decisions, even if the questions themselves are solid. Weighting shapes reality. Overrepresenting certain ...