Portuguese 
English 
Spanish 
3 min of reading 
0 comments 
A Groundbreaking Study Revealed a Concerning Decline in American IQ in 4 Out of 5 Analyzed Areas, Raising Questions About the Factors That May Be Impacting Cognition in Society.
The lingering question is simple: Are Americans getting dumber? The answer, according to a recent study, is not so clear, but reveals a worrying phenomenon.
The research, conducted by Northwestern University, suggests that IQ scores in the United States are declining. Almost all analyzed cognitive areas showed declines, raising concerns about the intellectual future of the country.
The Reverse Flynn Effect
For much of the 20th century, the increase in IQ scores was a global phenomenon. Known as the “Flynn Effect,” this increase was about three to five points per decade.
-
Tutankhamun’s jewel made with rare glass found in the desert may reveal traces of a gigantic cosmic collision that hit Earth around 29 million years ago and continues to intrigue scientists, archaeologists, and geology experts to this day.
-
French tourist accidentally enters a volcanic crater in Arkansas and comes out with a 7.46-carat diamond: rare brown stone became the eighth largest find since 1972 in a park where visitors can keep the treasure they find.
-
Without a brain, without teeth, and without haste, this carnivorous plant from California tricks wasps with special nectar before choosing which prey to devour.
-
Paranaense has been fighting for 16 years to bring a rare 1956 bus from Canada to Brazil, but the vehicle is held in Mexico due to a discrepancy in the serial number.
However, the study conducted by Northwestern University pointed to a reversal of this effect, which could mean a decline in IQ scores among Americans.
Between 2006 and 2018, the study analyzed data from 394,378 Americans and identified alarming drops in various cognitive areas.
If the increase in IQ scores was a constant throughout the last century, now a decline in four out of five main cognitive areas suggests that something is changing.
Which Cognitive Areas Were Affected in Americans?
The study showed significant drops in IQ scores in four specific areas:
- Verbal Reasoning – Involving logic and vocabulary.
- Matrix Reasoning – Related to solving visual problems.
- Letter and Number Series – Focusing on mathematics and computation.
- Verbal Memory – Related to recalling words.
However, the research also found an interesting twist: spatial reasoning (3D rotation) had a slight increase. Between 2011 and 2018, this area showed a minor improvement, which leads us to question: if one area is improving, what does this mean for the overall landscape?
What Is Behind the Decline?
The explanation for this decline in IQ scores is not simple. Some experts point to factors such as poor nutrition, deteriorating health, and even excessive media exposure. However, the authors of the study suggest that changes in the educational system may also be impacting these results.
In recent years, there has been a growing focus on areas such as science, technology, engineering, and mathematics (STEM).
This may have come at the expense of other cognitive skills, such as abstract reasoning and critical thinking. The emphasis on technical skills may, therefore, be sidelining important areas of intellectual development.
Another theory, advocated by lead researcher Elizabeth Dworak, suggests that Americans may simply not be as prepared to take these tests anymore. She explains that people may be engaging more with online personality tests, like the SAPA Project, than with cognitive tests themselves, which could affect the results.
Thus, people may not have diminished their mental abilities, but rather their aptitude for this specific type of examination.
Changes in IQ Scores
The study also detailed changes in IQ scores across each cognitive domain from 2006 to 2018:
| Cognitive Domain | Change in Scores |
|---|---|
| Verbal Reasoning | Significant Decline |
| Matrix Reasoning | Significant Decline |
| Letter and Number Series | Significant Decline |
| Spatial Reasoning (3D Rotation) | Slight Increase |
Are We Really Getting Less Intelligent?
Despite the alarming results, researchers warn against jumping to conclusions. Americans are not necessarily getting less intelligent, but there may be changes in how they approach cognitive tests.
The study does not attempt to determine the reasons behind the decline, it merely documents the changes.
It may be the case of a broader social transformation, where the greater focus on STEM disciplines may be diminishing the emphasis on essential cognitive skills. With more people directing their energies toward technology and less toward the arts and humanities, certain types of intelligence may no longer be as valued or developed.
Researchers at Northwestern University are not stopping here. They are planning a follow-up study with data spanning 40 years to try to better understand the causes of this alarming trend.
Additionally, the impact of social changes, such as the rise of digital media and the rapid technological advancement, may also be an important factor.
The study was published in the journal Intelligence and promises to pave the way for new investigations into the future of human intelligence and the challenges society faces in the 21st century.
-
1 person reacted to this.