A person’s IQ (intelligence quotient) is a score derived from standardized tests designed to measure human intelligence and intellectual potential. IQ tests include questions that measure reasoning and problem-solving skills. The discovery that average IQs differ worldwide has been a focus of inquiry and controversy.
Well I would say IQ tests don’t equate to actual intelligence. I also take issue with the adjective dumber.
OP could have worded it better, something like:
Not just you, but the creator of the IQ test himself, and most experts