There is always criticism that IQ tests may be biased, especially when the same set of questions are used on people from different cultures or of different races.
I'm not particularly interested in seeking evidence produced by any academic research regarding the validity of IQ testing. I still remembered my IQ was 62 according to a test in 1990 and 135 according to another test in 1997. I don't think I could make such progress in seven years' time and thus never believe this issue is worth exploring.
However, if my memory serves me, it seems that there are always 'pick-the-odd-one-out' questions in whatever form of IQ tests. From the following examples, you will understand why these tests are so biased.
Pick the odd one out:
- Asphalt, delight, leave and uncle
- Sun, moon, earth and lemon
- Da Vinci, Einstein, Kennedy and Marco Polo
- Asphalt, because it is the only one that cannot form an idiom with a national adjective. (You can have Turkish delight, French leave and Dutch uncle, but can you have XXX asphalt?)
- Earth, because when you were a wee boy or girl you usually coloured sun, moon and lemon 'yellow' with your crayon. (Earth is usually coloured blue or sometimes green.)
- Einstein, because he is the only one who doesn't have an airport named after him. (Da Vinci serves Rome, JFK serves New York and Marco Polo serves Venice.)
- we've never heard any of these three English idioms?
- we've never done any colouring with crayons in childhood?
- we've never visited Rome, New York or Venice?