Why Are Gen Z Cognitive Scores Declining?

TL;DR

Gen Z is not inherently less intelligent, but its cognitive strengths are shifting while traditional measures show declines in several areas. Short-form media, constant task switching, reduced deep reading, and cognitive offloading can weaken attention, working memory, and executive functioning, while younger people may be improving at spatial reasoning, rapid information filtering, digital literacy, and parallel processing.

Transcript

Is GenZ dumb? For almost a century, researchers saw a gradual increase in IQ scores across the entire globe at a rate of about three points per decade. But now, this trend is not only plateaued, it's begun to fall in the other direction. On top of this, we now have empirical evidence showing declines in literacy and numeracy, attention spans, memor... Read More

Key Insights

• The Flynn effect is the long-term rise in IQ scores observed when newer generations took older tests, historically averaging about three points per decade. The transcript connects these gains with expanded schooling, better childhood nutrition, reduced lead exposure, and lower burdens from infections and diseases.
• The reversal of IQ gains began before Gen Z, with declines already appearing among millennials and even earlier in some countries. Norwegian data covering hundreds of thousands of young military men showed scores peaking among people born in the 1970s, followed by declines of around two and a half points per decade.
• Gen Z is improving in some visual and spatial components of IQ even as overall scores decline. Researchers in the transcript suggest that growing exposure to photos, television, movies, video games, computers, and increasingly complex imagery may help younger people perform better on visual tests.
• Academic performance declines are visible beyond IQ testing. The Program for International Student Assessment has recorded major decreases since the 2000s, while average SAT and ACT scores in the United States have reached multi-decade lows, supporting concerns about changes in literacy, numeracy, and related academic skills.
• Rapid short-form media consumption can produce cognitive exhaustion by repeatedly forcing attention to switch. According to the cited research, this pattern disrupts executive functioning, sustained focus, and working memory, consuming mental resources that would otherwise support deep, sequential, and logical reasoning.
• Deep reading supports crystallized intelligence, which is the ability to apply previously learned information to new problems. Gen Z engages less often in this sustained form of concentration, while older generations developed under comparatively greater exposure to long-form media, reading, and environments with fewer distractions.
• Cognitive offloading occurs when people rely on smartphones and search engines instead of retaining information internally. The Google effect describes the tendency to forget information that remains easily accessible, and reduced practice with retention can contribute to lower working-memory scores on standardized assessments.
• Gen Z's cognitive resources appear to be reallocated rather than genetically diminished. Its strengths include spatial awareness, rapid information filtering, technological and media literacy, and parallel processing, while traditional tests designed for industrial and early bureaucratic needs often fail to measure these modern capabilities.

Questions & Answers

Q: Why are Gen Z IQ scores declining?

Gen Z IQ scores may be declining partly because earlier environmental improvements had already raised the lower end of average performance, leaving less room for continued gains. The transcript also connects recent declines with short-form media consumption, constant attention switching, reduced deep reading, and cognitive offloading through smartphones. Importantly, the downward trend began with millennials, so it is not unique to Gen Z.

Q: What is the reverse Flynn effect?

The reverse Flynn effect is the recent stall or decline in IQ scores after almost a century of global increases known as the Flynn effect. IQ scores had risen at about three points per decade as schooling, nutrition, disease control, and protection from lead improved. In industrialized countries, that trend later flattened and reversed, although countries emerging from poverty continue to show substantial gains.

Q: Does declining IQ mean Gen Z is less intelligent?

Declining overall IQ scores do not establish that Gen Z has inferior brains or is experiencing genetic regression. IQ tests measure a limited set of abstract problem-solving abilities, and younger people are improving in some visual and spatial test categories. They also demonstrate strengths in rapid information filtering, technological and media literacy, and parallel processing, which traditional cognitive assessments may not capture.

Q: How does short-form content affect attention and memory?

Rapid consumption of low-quality short-form content can create cognitive exhaustion because the brain must continually switch between unrelated pieces of information. The transcript says this pattern disrupts executive functioning, sustained attention, and working-memory capacity. Constant switching uses mental resources that could otherwise support deep, sequential reasoning, and the effect can influence people of every generation, not only Gen Z.

Q: What is cognitive offloading and how does it affect memory?

Cognitive offloading is the practice of relying on tools such as smartphones and search engines instead of remembering information internally. People no longer need to memorize many routes, map layouts, or facts because they can retrieve them immediately. The related Google effect means people tend to forget information they know is easily accessible, and reduced retention practice can lower working-memory performance on standardized tests.

Q: Why might Gen Z perform better on visual tests?

Gen Z may perform better on visual tests because younger generations have grown up in an increasingly visual environment. Their lives include extensive exposure to photographs, television, movies, video games, computers, and more complex imagery. Researchers cited in the transcript suggest that this experience may strengthen visual and spatial reasoning, even while overall IQ scores and some other cognitive measures decline.

Q: How does deep reading support cognitive ability?

Deep reading provides sustained practice in concentration and has been shown to support crystallized intelligence, defined in the transcript as the ability to apply previously learned knowledge to new problems. Gen Z engages less frequently in this kind of focused reading. Older generations developed with more long-form media, reading, and comparatively low-distraction environments, which may make sustained attention easier to recover after reducing distracting content.

Q: What cognitive strengths does Gen Z have?

Gen Z shows strengths in spatial awareness, rapid information filtering, technological literacy, media literacy, and parallel processing. These abilities fit an environment dominated by digital tools and visual information but are often overlooked by traditional standardized tests. School systems have also shifted away from simple memorization toward collaborative learning, practical problem-solving, and digital literacy, reinforcing skills that differ from those emphasized by older assessments.

Summary & Key Takeaways

• IQ scores rose globally for decades through the Flynn effect, likely alongside improvements in schooling, childhood nutrition, disease control, and reduced lead exposure. That growth has stalled or reversed in industrialized countries, although developing countries emerging from poverty continue to record gains resembling those previously seen in wealthier nations.

• Declines extend beyond overall IQ scores to international student assessments, SAT and ACT results, attention, memory, and executive functioning. Heavy consumption of rapidly changing, low-quality short-form content may contribute by encouraging constant mental switching, while smartphones enable cognitive offloading that reduces the need to remember facts, directions, and map layouts.

• Traditional tests may miss abilities that modern environments cultivate. Gen Z shows strengths in visual and spatial tasks, rapid information filtering, technological and media literacy, and parallel processing. The evidence therefore suggests cognitive reallocation rather than genetic decline, although impaired focus and reduced deep reading remain genuine concerns across generations.