Focus Groups vs. Polls
The qualitative and quantitative approaches to understanding public opinion, what each reveals, and how they complement each other.
Different Tools for Different Questions
Polls tell you what people think. Focus groups tell you why they think it. A poll might show that a candidate's approval has dropped 5 points. A focus group reveals that voters are angry about a specific broken promise and use phrases like 'she lied to us.' The poll gives the number; the focus group gives the story behind the number.
Polls are quantitative: they produce numbers that can be generalized to the population with known confidence intervals. Focus groups are qualitative: they produce insights, language, and emotional texture that no survey can capture. Each is essential, and each is useless for the other's purpose.