It isn't true that IQ tests contain questions about tea-service items or yachting or other culturally biased questions. Raven's Progressive Matrices [1] is an

It isn't true that IQ tests contain questions about tea-service items or yachting or other culturally biased questions. Raven's Progressive Matrices [1] is an example of a test that doesn't depend upon knowledge of tea service items. [1] https://en.wikipedia.org/wiki/Raven%27s_Progressive_Matrices https://en.wikipedia.org/wiki/Raven%27s_Progressive_Matrices