Methods 101: What is machine learning, and how does it work?
We explain the basics of machine learning – using computer programs to identify patterns in data – and how it allows researchers at the Center to analyze data on a large scale.
Polling in different parts of the world can be very challenging, because what works in one country may not work in a different country.
Recent events – including the 2016 presidential election and Brexit – have rattled public confidence in polls. But this video explains why well-designed polls can still be trusted and remain an important way to measure public opinion.
The second video in Pew Research Center’s Methods 101 series helps explain question wording – a concept at the center of sound public opinion survey research – and why it’s important.
The first video in Pew Research Center’s Methods 101 series helps explain random sampling – a concept that lies at the heart of all probability-based survey research – and why it’s important.
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