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https://en.wikipedia.org/wiki/Flynn_effect
The short answer is "Yes". Scores rise about 3-pts every decade and the "Q" is adjusted accordingly. That said, modern education and modern intelligence testing aren't independent of one another. It is very possible to train for an IQ test and improve your score (a thing that was originally argued as impossible when these tests were formulated). And - both consciously and unconsciously - we've geared our education system around improvements on standardized exams.
There's also a host of environmental improvements - better nutrition, fewer diseases, less heavy metal poisoning - which all contribute to higher cognition. These latter factors are suggested in no small part thanks to a leveling off of the Flynn Effect in later years, both thanks to marginal declines in all of the above and thanks to the diminishing returns once individuals reach peak performance.
But intelligence testing is also a very sketchy and misunderstood field, with lots of scams surrounding its practical application and enormous stigmas associated with any population that scores "below average".
Much like polygraph testing and dowsing (yes, American police still use dosing rods), its a methodology that police seem to cling to long after it has worn out its usefulness in practical terms.