But then why (supposedly) has IQ been declining since 1950?
I don't know if this is IQ, but there is more to thinking good than speed.
Anyone that can count really fast has speed. But that alone is of limited use. And Knowledge is not the only other variable.
There are savants that think very fast, and have deep clear knowledge about very narrow subjects, ready to recall very quickly.
You've seen the people who, given a date can tell you immediately the day of the week, the weather, headlines, any significant events in their lives. A living catalog. But it isn't very interesting having a conversation with a catalog. Interesting thoughts come from breadth.
How many different things can you think of simultaneously? Not serially, that would be speed again. I tried to train this when I was young by watching TV science programs and listening to radio news while exercising. Seemed to help. Then there is mental endurance. How long can you maintain attention on a single topic? Working your way down to the deepest depth of your knowledge while maintaining subject width at speed. What property falls away first for you?
I've had at least 2 Stanford-Binet IQ tests administered by different neuropsychologists over a decade apart, both after my 20ft fall w/orbit fracture. One timed everything, and the other only timed some tests because I clearly had slow recall,
but it would eventually come to me. Not all the tests had speed as a primary factor, taking my time just cost me a few points compared to those able to do it faster. But I was able to complete harder tests worth more points because I was willing to endure while the faster people gave up quickly. The tests were 1 point apart on the overall score and very close on the subscores. Only to say that while speed is a factor in IQ, it is not the only factor.
Perhaps IQ is going down because the average width is going up. Every human has more different things they need to hold in their head at the same time. Its like a computer that increases bus width at the cost of processor speed.
Burgerman wrote: Its basically how fast your brain can solve problems that are hard to do.
Does intelligence shape the success of a country, or is it the other way around? The question of intelligence, often measured by IQ, has long intrigued both scientists and policymakers.
While IQ is just one piece of the puzzle when it comes to a person’s or a society’s development, it can still reflect certain patterns within countries.
Across the globe, intelligence is frequently assessed through IQ (intelligence quotient) tests, which aim to measure a range of cognitive abilities including problem-solving, logic, and comprehension. While it can be a controversial measure of intelligence, it remains a popular measure.
The average IQ is set at 100 on IQ tests, with higher or lower scores indicating higher or lower cognitive ability, respectively. 1 full deviation is 15 points.
A country’s average IQ does not conclusively determine its citizens’ potential or capabilities. Therefore, it is crucial to understand that a high average IQ in a country does not necessarily indicate the intelligence of all its citizens.
Countries that consistently score high in cognitive ability have successfully developed robust educational systems, prioritized research and development, and implemented efficient policies. As a result, their populations have exhibited high average IQs over time.
CEOWORLD magazine published a research study revealing that almost two-thirds of people worldwide believe they are smarter than the average person. According to research, Japan has the highest average IQ, 106.48.
Results from 2024 2025 testing:
In Africa, Liberia has an average IQ of 45.07, placing it at 198th in global rankings. Sierra Leone follows closely with the same average IQ of 45.07, ranking 197th. Cape Verde, with an average IQ of 52.5, is ranked 195th.
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