The parents sat across from me convinced their son was destroying his mind.
He was fourteen, and he played video games for two to three hours most days. His grades were fine, his friendships were intact, and by every clinical measure I could identify, he was a well-adjusted adolescent. But his parents had absorbed a cultural message so pervasive that his ordinary behavior looked to them like a slow-motion catastrophe. They had come to me for an assessment because they wanted, in the father's words, "documentation of the damage before it becomes permanent."
I ran the full battery. His cognitive scores were not merely normal. On several measures, particularly those involving spatial reasoning, processing speed, and working memory, he performed well above average. When I shared the results, his mother's first response was disbelief. "But he games constantly," she said, as though the scores had to be a mistake, because everyone knew what gaming did to a developing brain.
This is one of the most consequential gaps between popular belief and scientific evidence that I encounter in my practice. The cultural narrative holds that video games rot the brain, shorten attention spans, and displace the activities that build real intelligence. The research literature tells a substantially different and more nuanced story, and in one landmark study, it tells nearly the opposite story.
This article walks through what the science actually shows about video games and intelligence, including a study of over 9,000 children that found gaming causally increased IQ, what specific cognitive abilities games appear to train, where the genuine risks lie, and what all of this means for how you think about your own cognitive abilities and those of the gamers in your life.
The Study That Surprised Everyone
In 2022, a research team led by Bruno Sauce and Torkel Klingberg published a study in the journal Scientific Reports that directly challenged the brain-rot narrative. The study is notable not just for its findings but for the rigor of its design, which addressed the weaknesses that had plagued earlier research.
The researchers drew on data from the Adolescent Brain Cognitive Development study, a large American longitudinal project. Over 9,000 children participated. At ages nine and ten, the children completed a battery of psychological tests measuring general cognitive ability. The researchers then tracked how much time these children spent on three categories of screen activity: watching television and online videos, using social media, and playing video games. Two years later, a subset of more than 5,000 of the children were tested again, allowing the researchers to see how their intelligence had changed over time in relation to their screen habits.
On average, the children spent two and a half hours a day watching TV and videos, half an hour on social media, and one hour playing video games. The researchers examined how each of these activities related to changes in measured intelligence between the two testing sessions.
The results contradicted the cultural narrative directly. The children who spent more time than average playing video games increased their intelligence between the two measurements by approximately 2.5 IQ points more than the average child. Watching television and videos had no significant effect on intelligence, positive or negative. Social media use also had no significant effect, positive or negative.
Read that carefully, because the specificity matters. It was not screen time in general that predicted cognitive gains. Television and social media, the two most common screen activities, had no measurable effect on intelligence in either direction. It was specifically video game playing, the activity most demonized in popular discussion, that predicted an increase in intelligence over time.
Why This Study Was Different
Studies linking behavior to intelligence are notoriously difficult to interpret, because of a problem that haunts all of this research: confounding. If gamers score higher on cognitive tests, perhaps gaming did not make them smarter. Perhaps smarter children are simply more drawn to video games in the first place. Perhaps children from wealthier families both game more and score higher for reasons related to their socioeconomic advantages rather than to gaming itself. These alternative explanations have undermined countless studies in this field.
The Sauce and Klingberg study was specifically designed to address these confounders, and this is what makes it more compelling than the studies that came before it.
First, the study was longitudinal. Rather than comparing gamers to non-gamers at a single point in time, it measured the same children twice, two years apart, and examined how their intelligence changed. This design is far more powerful for detecting causal effects, because it tracks change within individuals rather than merely comparing different individuals.
Second, and most importantly, the researchers controlled for genetics. They used genetic data to account for the differences in cognitive ability that children inherit. This addressed the possibility that innately more intelligent children were simply drawn to gaming. By statistically removing the genetic contribution to intelligence, the researchers could examine whether gaming predicted cognitive gains above and beyond what genetics would predict. It did.
Third, the study controlled for socioeconomic background. This addressed the possibility that family wealth and its associated advantages were driving both gaming habits and cognitive scores. Even after accounting for socioeconomic differences, the gaming effect persisted.
The combination of these three design features, longitudinal measurement, genetic controls, and socioeconomic controls, makes this study substantially stronger than the correlational snapshots that dominate the field. The researchers themselves were appropriately cautious, noting that even this design cannot definitively prove causation. But it moves the evidence considerably closer to a causal interpretation than anything that came before, and the direction of that evidence points toward gaming supporting cognitive development rather than harming it.
As the researchers noted, their results support the conclusion that screen time in general does not impair children's cognitive abilities, and that playing video games specifically can actually boost intelligence. This aligns with a body of experimental research on video game training that has accumulated over the past two decades.
What Video Games Actually Train
If video games support cognitive development, the natural question is how. What is it about playing games that would produce measurable cognitive benefits? The research on this question is more mature than most people realize, and it points to several specific cognitive capacities.
The most extensively studied is visuospatial attention. A long line of research, much of it conducted by Daphne Bavelier and C. Shawn Green, has demonstrated that action video games in particular train the ability to process visual information across space, track multiple moving objects simultaneously, and rapidly shift attention to relevant targets. In controlled experiments, people trained on action video games showed measurable improvements in these visuospatial abilities compared to control groups trained on non-action games. These are not trivial skills. Visuospatial processing is a core component of general cognitive ability and a strong predictor of success in science, technology, engineering, and mathematics.
The second is working memory. Many games require players to hold multiple pieces of information in mind simultaneously, tracking objectives, resources, enemy positions, and strategic plans, while continuously updating this information as the game state changes. This is precisely the kind of demand that engages and potentially strengthens working memory, one of the cognitive systems most closely linked to general intelligence.
The third is processing speed. Fast-paced games demand rapid perception and response, requiring players to detect changes and react within fractions of a second. Processing speed is a fundamental cognitive capacity that correlates substantially with general intelligence, and the sustained practice of rapid perception and response that games provide appears to train it.
The fourth is cognitive flexibility and problem-solving. Complex strategy games and puzzle games require players to adapt to changing conditions, generate and test hypotheses, plan several steps ahead, and shift strategies when circumstances change. These executive functions are central to fluid intelligence, the capacity for novel reasoning that sits at the heart of most definitions of intelligence.
The common thread is that video games, unlike passive screen activities, are cognitively demanding. They require active engagement, rapid decision-making, spatial reasoning, memory, and adaptation. This is likely why the Sauce and Klingberg study found that gaming boosted intelligence while television and social media did not. Watching a video is largely passive. Scrolling social media is largely passive. Playing a challenging video game is an active cognitive workout, and the brain appears to respond to that workout much as a muscle responds to physical training.
The Correlation Between Gaming Skill and Intelligence
Beyond the training effects, there is a separate and consistent finding: performance in complex video games correlates with measured intelligence. A 2017 study by Kokkinakis and colleagues, published in the journal PLOS ONE, examined the relationship between skill in two popular strategy games and fluid intelligence. The researchers found that performance in these cognitively demanding games correlated significantly with fluid intelligence, to the degree that game performance could serve as a rough proxy for cognitive ability.
This finding makes intuitive sense in light of what the games demand. Complex strategy games require exactly the capacities that intelligence tests measure: rapid reasoning, working memory, planning, adaptation, and the integration of multiple streams of information under time pressure. It is not surprising that the people who excel at these games tend to be the same people who excel at cognitive tests, because the underlying cognitive demands overlap substantially.
This correlation does not prove that gaming makes people smarter, on its own. It could reflect smarter people gravitating toward and excelling at complex games. But combined with the longitudinal, genetically controlled evidence from the Sauce and Klingberg study, and the experimental evidence from video game training studies, it contributes to a coherent picture in which gaming and cognitive ability are genuinely linked, with the causal arrow pointing at least partly from gaming to cognition.
Where the Real Risks Lie
I would be presenting an incomplete and irresponsible picture if I left the impression that video games are uniformly beneficial and free of risk. They are not, and the clinical reality is more nuanced than either the brain-rot narrative or a naive celebration of gaming.
The cognitive benefits documented in the research concern moderate gaming, typically an hour or two a day of the kind of cognitively demanding games that most children and adults play. The research does not support the conclusion that unlimited gaming is beneficial, and it does not examine the effects of the extreme gaming patterns that characterize a minority of players.
The genuine risks of gaming are largely not cognitive. They concern displacement and dysregulation. When gaming displaces sleep, physical activity, in-person socializing, or academic responsibilities, those displacements carry real costs, even if the gaming itself is cognitively enriching. A child who games for eight hours a day is not harming their processing speed, but they are almost certainly sacrificing sleep, exercise, and social development, all of which matter enormously for both cognitive and emotional health.
There is also a genuine clinical phenomenon of gaming disorder, recognized by the World Health Organization, in which gaming becomes compulsive and displaces the normal activities of life to a degree that causes significant impairment. This affects a small minority of players, but it is real, and it should not be dismissed. The existence of cognitive benefits from moderate gaming does not negate the existence of harm from compulsive gaming, just as the nutritional benefits of food do not negate the reality of eating disorders.
The Sauce and Klingberg researchers were careful to note the boundaries of their findings. They did not examine the effects of gaming on physical activity, sleep, wellbeing, or school performance, and they explicitly declined to make claims about those domains. Their finding was specific: gaming did not impair cognitive development and appeared to support it. That finding coexists with the reality that gaming, like any activity, can be taken to harmful extremes.
The clinical summary is that moderate engagement with cognitively demanding video games appears to support cognitive development, while excessive gaming that displaces sleep, exercise, and social connection carries real costs that have nothing to do with the cognitive content of the games themselves. The dose, as with so many things, makes the poison or the medicine.
What This Means for You
The video game research connects to a larger truth about intelligence that runs through much of modern cognitive science: intelligence is more malleable than the fixed-number model suggests, and it responds to how we engage our minds.
If you are a gamer who has absorbed cultural messages that your hobby is rotting your brain, the science offers a substantial correction. Moderate engagement with cognitively demanding games is not damaging your cognitive abilities. It may well be supporting them, particularly in the domains of spatial reasoning, working memory, processing speed, and cognitive flexibility. The activity you may have felt vaguely guilty about is, within reasonable limits, a cognitive workout rather than a cognitive drain.
If you are a parent worried about your child's gaming, the research suggests recalibrating your concern. The relevant question is not whether your child games, but whether gaming is displacing the other things that matter: sleep, physical activity, in-person friendship, and academic engagement. A child who games moderately while maintaining these other pillars of development is, according to the best available evidence, not harming their cognitive development and may be supporting it. A child whose gaming has crowded out sleep, exercise, and social life faces real risks, but those risks come from the displacement, not from the cognitive content of the games.
And if you are simply curious about your own cognitive abilities, the gaming research illustrates why measuring them directly is more informative than inferring them from your habits or activities. The parents I described at the beginning of this article assumed their son's gaming meant his cognitive development was impaired. The actual assessment showed the opposite. Assumptions about intelligence, based on lifestyle and activities and cultural stereotypes, are frequently wrong in both directions.
A validated cognitive assessment replaces assumption with measurement. It tells you where your cognitive abilities actually stand, against population norms, with a percentile-ranked score and a profile of your relative strengths across the domains that games are thought to train: spatial reasoning, working memory, processing speed, and fluid reasoning. If you are a gamer curious whether the cognitive demands of your hobby are reflected in your cognitive profile, direct measurement is the way to find out, rather than relying on either the brain-rot stereotype or the optimistic counter-narrative.
Final Thoughts
The gaming assessment I described at the beginning ended with a conversation I have had, in various forms, many times. The parents had come expecting documentation of damage. They left with evidence that their son's cognitive development was not merely intact but, in several domains, notably strong. Their relief was mixed with a kind of disorientation, because the results contradicted a narrative they had absorbed so thoroughly that they had stopped questioning it.
I told them what the research supports. Their son's gaming was not the threat they had imagined. The genuine questions worth attending to were about balance: whether he was sleeping enough, moving his body enough, maintaining his friendships, and keeping up with his responsibilities. On all of these, he was doing fine. The gaming itself, the thing they had feared most, was the least of their legitimate concerns, and quite possibly a contributor to the strong cognitive scores that had so surprised them.
The broader lesson extends well beyond video games. Our cultural intuitions about what helps and harms the mind are frequently wrong, shaped more by unease about new technologies than by evidence about their actual effects. Each new medium, from novels to radio to television to video games to smartphones, has provoked confident predictions of cognitive ruin, and the evidence has repeatedly turned out to be more complicated and less alarming than the predictions.
Video games are cognitively demanding activities that, engaged with in moderation, appear to support rather than harm cognitive development, according to the strongest evidence available. This does not mean unlimited gaming is beneficial, and it does not mean gaming is free of risk. It means the specific fear that games rot the brain is not supported by the research, and in at least one large, well-designed study, the evidence points the other way.
If you want to understand your own cognitive abilities, or those of the gamer in your life, the answer is not to reason from stereotypes about what gaming does to the mind. It is to measure the mind directly and see what is actually there. In my clinical experience, what is actually there is frequently a good deal more impressive than the cultural narrative would lead anyone to expect.
