Narrowing a research topic is moving from a general topic, like global warming, to a tighter research focus, such as helping the environment by improving travel modes (example below). However, you can ...

Good research is driven by analytical questions. However, in order to know what questions to ask, it is necessary to learn what research already exists on your topic. What are the gaps 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 ...

Power analyses and sample size calculations are important parts of many research projects. Often, before data are even collected, it is necessary to calculate and justify the required sample size for ...