Most of us are familiar with the idea that as we age, our mental efficiency declines. But this is something that can be measured – does our IQ decrease with age?

If so, at what speed? Do different types of intelligence decline at different rates?

To dig deeper into these questions, MetaFact asked five experts in intelligence, behavioral science, and psychology;Does IQ decrease with age?‘ . Here’s what they say…

What is IQ and how is it measured?

“Intelligence is often measured by a set of tests, for example, some on language skills, some on non-verbal skills like puzzle solving, some on how quickly you can complete a task.” He says. Michael Thomas, a psychologist and neuroscientist at Birkbeck University in England.

“Your intelligence will be the average of your scores on these tasks compared to how well other people do.”

IQ tests evaluate Different skills Like how well you retain and learn information, your abstract reasoning and visual-spatial processing.

IQ means ‘IntelligenceAnd it’s a standard score relative to other people your age.

If your intelligence is average for your age, your IQ score would be 100. Above average is more than 100, and below average is less than 100.

Does an individual’s IQ change with age?

An individual’s IQ does not change with age.

In other words, if you took an IQ test now and another in 10 years, your IQ score would probably be very similar. This is because IQ is always measured relative to other people your age.

“IQs are always calculated relative to a person’s age, be it 10, 15, 25, 50, 72, or 88. So 25-year-olds are compared to other 25-year-olds on the number of items. 50-year-olds are compared to other 50-year-olds. They answer correctly on any task compared to . He explains Alan Kaufman, an expert on espionage testing from Yale University in the US.

“For each age group, the average or median IQ is set at 100. We cannot directly compare the average IQs across age groups in adults because – by definition – each group will have an average of 100.”

Meiran Nachshon, a psychologist at Ben-Gurion University in Israel, agrees:

“IQ indicates an individual’s relative position relative to the average. This relative position is extremely stable.”

To support this, a Publication He found a strong correlation between the IQ of people aged ~11 and ~90.

Does the average IQ of the population change with age?

To measure how IQ changes over time, we need to be able to compare the IQ of older adults with their younger counterparts.

Due to the reasons mentioned above, this is often impossible, instead a different method is required.

Kaufman He explains How this works:

The first thing we need to do is find a common ‘standard’ to compare adults. We can compare the performance of 70-year-olds, 60-year-olds, 50-year-olds, and 40-year-olds. Norms established for young adults (reference group or standards) etc.

“In my research, we define young adults as being around 30 years old (usually 25-34). That way, young adults have an average IQ of 100 because that’s the way norms are developed. For young adults, age tells us how IQ changes as we age.”

Kaufman He says. When these tests are done[a] A clear failure [in IQ] It’s obvious.”

Not all types of intelligence decline at the same rate.

IQ tests measure many types of intelligence and group them together.

“Global IQ is a combination of different types of intelligence, the most popular being researched as fluid intelligence and crystallized intelligence, which together with the abilities of working memory and processing speed combine to produce global or full-scale IQ.” He says.

“Fluid intelligence or fluid thinking reflects the ability to solve new problems that are not taught in school.” He explains“Crystallized intelligence or crystallized knowledge measures learning and problem solving related to education.”

These different intelligences show different patterns as they grow.

Crystallized Intelligence “averages 98 at ages 20-24, rising to 101 at ages 35-44, before dropping to 100 (ages 45-54), then 98 (55-64), then 96 (65-69), then 93 ( 93) 70–74) and 88 (75+)”. He says. Kaufman.

Fluid intelligence decreases very quickly. Kaufman It explains Before the rollercoaster starts, it drops to 91 (45-54), 86 (55-64), 83 to 99 (25-34) and 96 (35-44). (65–69), 79 (70–74) and 72 (75+).

Thomas He says: “The fastest reaction times are in your mid-twenties, but (as long as you don’t develop dementia), vocabulary will increase throughout your life.

“Even in the late sixties, most cognitive abilities are built on what you’ve learned (so-called crystallized knowledge), or they’re too strong. The speed to do things can slow down.”

Taken from:

Individual IQ does not change as you age, but on average our abilities decline with age.

May the truth be with you!

An article based on expert answers to this question: Does IQ decrease with age?

This expert response is published in partnership with an independent fact-checking platform Metafact.io. Sign up for their weekly newsletter over here.

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