I failed a job application because of the IQ test. It was administered in a second language for me, so I really didn't do well... the interviews had been completely smooth and I got on well with everyone I had talked with...

The thing is, I really needed that job... ended up going to another job that offered me a very low salary (I had no visa in the country , so was looking for a sponsor, which makes things a lot harder) and the company went bankrupt within a few months!

Anyway, I still got the visa, and then, with a few months to find another job with more peace of mind, I eventually got much nicer job, paying a lot more! But I still dread the though of doing an IQ test, despite my years of experience indicating I am more competent than average, at least.