Research methods

Research methods

Expert panels & user trials

Find out more about the methodologies Which? uses in its research

How we test cars

Learn how Which? tests cars more thoroughly than anybody else Contains video

Lab testing

Discover more about why Which? tests products in labs and why it's so important

Mystery shopping & investigations

We go undercover to test a number of consumer services

Surveys

Learn more about the surveys that we carry out as part of our regular research

Symbols & ratings

Discover what all the various Which? symbols and ratings mean

Taste tests

We regularly run taste tests to find the best food and drink on the market

Products we don't test

Find out the reasons why Which? doesn't test certain products