Data collection is the process of gathering and measuring information used for research. Collecting data is one of the most important steps in the research process, and is part of all disciplines ...

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 ...

Infectious disease research is an essential component of human society that has been thrown into the spotlight by the COVID-19 pandemic. This research is enabled by a diverse array of methods and ...