You can actually prepare for specific IQ tests and thus inflate your score.
Though presumably that's just gaming a test and has zero impact on IQ as measured by unrelated tests. However as this makes the tests less accurate it's discouraged.
Re:Taleb is wrong about IQ
by ohaideredevs on Monday July 29, 2019 @02:10PM
(#20557540)
Right. That's a huge problem even when trying to figure out if your IQ changed over time. Even with Raven's progressive matrices, just knowing roughly what type of manipulations can be done to the shapes can help a lot with your score.
For fair disclosure, there was a study which showed that as IQ decreased, the span of time for a perfect IQ score prep increased almost infinitely, as the low IQ kids forgot the material they already learned. Maybe I will look for it later, would be very relevant here.