Before even getting out of bed, a large share of youth checks the phone and finds a video that lasts less than a minute. The question on their mind, a historical fact, a health concern or a discussion with a friend, finds there an answer condensed into thirty seconds, with no need to open a search engine or finish reading a full article. That habit, repeated millions of times a day, stopped being a curiosity of cultural consumption and became an object of scientific study. A meta-analysis published in 2026 by the journal Psychological Bulletin, drawing on data from nearly one hundred thousand people, measured for the first time with that volume of evidence what happens to attention and impulse control when short video replaces slower ways of resolving a question. The finding does not describe a passing generational taste, it describes the measurable weakening of a specific brain function.
An architecture already documented, a question still unanswered
This outlet documented in February 2026, in the investigation “Ingeniería del vicio”, the design architecture that sustains compulsive short video consumption, the infinite scroll conceived by Aza Raskin in 2006, the variable reward mechanism that lawyers and neuroscientists compare to a slot machine, and the ongoing trial in Los Angeles against Meta and Google over the addictive design of their platforms. That work established that addiction is not a side effect of the design, but the product platforms sell to their advertisers. On 25 March 2026, a jury at that city’s Superior Court confirmed part of that thesis by finding Meta seventy percent liable and Google thirty percent liable for the harm suffered by a plaintiff identified as Kaley, with six million dollars in damages.
What that investigation did not answer, because it was not its object, is what specifically happens to the capacity to wait for an answer when that mechanism is applied for years to a brain still in formation. That question, narrower and more measurable, is the one now starting to gather its own evidence.
The difference in focus matters. An investigation into addiction asks whether a person can stop using a platform. An investigation into immediacy asks something different, and harder to reduce to a headline, how capable that person remains of tolerating the time a response demands when it does not arrive in short video format. A person can fail to be addicted to TikTok, checking it for only a few minutes a day, and still have lost much of the tolerance for waiting that reading a long text, watching a full documentary or waiting for the outcome of a journalistic investigation demands before drawing a hasty conclusion. That distinction is what separates the question posed here from the one already answered, with stronger legal evidence, by the February investigation.
Seventy-one studies, one direction
The scientific journal Psychological Bulletin published in 2026 a systematic review and meta-analysis gathering data from ninety-eight thousand two hundred ninety-nine participants across seventy-one independent studies on short video consumption. The central finding indicates that high consumption of this format is associated with a moderate decline in cognition, particularly in attention and inhibitory control, and with a milder but consistent decline in mental health, above all in stress and anxiety. The pattern repeats among adolescents and adults alike, and across TikTok, Reels and Shorts equally, which rules out the effect depending on a single platform or a particular algorithm.
That finding carries a precise implication for immediacy as a daily habit. Inhibitory control is, in simple terms, the brain function that allows a reward to be deferred, a question to be held without resolving it at once, the wait required to read a long text or watch a video through to the end to be tolerated. Cognitive psychology has long measured it through tasks that ask a subject to withhold an automatic response, the kind of laboratory test that produces a number rather than an impression. It is no coincidence that this is, according to the meta-analysis, the function showing the strongest association with high short video consumption. The researchers themselves caution that these are associations of moderate magnitude, not proof of definitive causation, and that more longitudinal research is needed to know whether the pattern reverses when consumption drops.
The public conversation rarely makes this distinction.
The meta-analysis separates the effect on cognition from the effect on mental health, and finds the former stronger than the latter. That matters because much of the public conversation about short video centres on anxiety, self-esteem and social comparison, categories that are easier to discuss at a dinner table than a laboratory measure of inhibitory control, while the strongest evidence points elsewhere, toward the weakening of the cognitive machinery that sustains the effort of thinking a problem through to the end rather than accepting the first condensed answer that appears on screen. The study’s authors note, with the caution proper to a systematic review, that few investigations exist on memory and reasoning compared with those on attention, which leaves open the question of whether the documented effect is merely the visible part of a still broader phenomenon, harder to measure with the instruments available today.
The meta-analysis Feeds, Feelings, and Focus, published in Psychological Bulletin with data from ninety-eight thousand two hundred ninety-nine participants across seventy-one studies, found that high short video consumption is associated with weakened attention and inhibitory control in adolescents and adults alike.
Colombia, the generation that never knew waiting
None of this mechanism is exclusive to the United States or to English-language platforms. According to the DataReportal Colombia 2025 report, TikTok reached, in January of that year, 32 million adult users in the country, equivalent to 79.5 percent of the population over 18, with growth of 4.68 million new accounts in barely twelve months. Digital analytics firms tracking the Colombian market estimated, as of October 2025, the average daily time on TikTok at one hour forty-nine minutes per user. The Colombian Institute of Family Welfare also cites data from the Ministry of Information Technologies showing that 88 percent of the country’s adolescents and young people were active internet users, though that measurement dates from 2017 and has not been updated with comparable methodology since.
The difference from the American figures lies not in the volume of use, but in the generational starting point. Earlier generations arrived at short video already formed, with a before and an after they could compare. The Colombian adolescence starting secondary school in 2026 has no such point of comparison. It entered digital life when the thirty-second format was already the dominant form of entertainment and, increasingly, the dominant way of resolving an everyday question. No study with methodology comparable to that of Psychological Bulletin has yet been replicated with a sample exclusively Colombian or Latin American, a gap that prevents affirming with the same statistical certainty that the pattern of attentional decline documented in the United States, the United Kingdom or China repeats here to the same degree.
That statistical gap is not a minor methodological detail.
It means that public policy decisions on screen use in Colombian schools, where they exist, rest on evidence produced in other countries, with populations that do not necessarily share the same mobile internet access, the same educational support on offer, or the same daily commute time that in Colombia tends to be filled, precisely, with the phone in hand. A secondary school teacher in Bogotá who wants to make a case to a principal or to a parent about the effects of short video on their students has to do so by citing studies from Zhejiang, from American universities or from European surveys, translated evidence about a different adolescence, because local research does not yet exist with that level of rigour.
According to the Colombian Institute of Family Welfare, in the latest available measurement, from 2017, 88 percent of the country’s adolescents and young people were internet users; the DataReportal Colombia 2025 report records, already in current figures, 32 million Colombian adults using TikTok, with a daily average of one hour forty-nine minutes per user on that platform.
What is lost while waiting for the thirty-second answer
The cost of this habit is not measured in minutes alone. It is measured, above all, in what stops being attempted. Searching a search engine demands reading several results, comparing sources, reformulating the question if the first answer does not convince. A reel condenses that entire sequence into a closed format, with no margin for comparison or doubt. The observable consequence, according to the same studies reviewed by Psychological Bulletin, is not that young people lose intelligence, but that they lose the training to sustain the cognitive effort a longer route to an answer demands, the same effort demanded by reading a whole book, following an extended argument or waiting for the outcome of an investigation before drawing a conclusion.
That loss of training carries a consequence rarely discussed in the same terms as screen addiction. A person who learned to wait for an answer condensed into thirty seconds tends, without meaning to, to distrust any explanation that takes longer than their consumption habit considers reasonable. The problem is not only how much time is lost in front of the phone, it is what kind of explanations, at what length and with what patience, someone who spent years training for exactly the opposite remains capable of tolerating.
That training does not distinguish between contents. A thirty-second video that explains a scientific phenomenon correctly and with verification trains the same expectation of brevity as a thirty-second video that offers a simplified, incomplete or outright false version of that same phenomenon. Duration conditions the expectation before the content has any chance to demonstrate its quality, and once the thirty-second expectation is set, any explanation that needs more time competes at a disadvantage against it, no matter how much more precise or honest that longer explanation turns out to be. That mechanism does not depend on the intent of whoever posts the video, it depends solely on the format, and that is why it proves harder to correct with media literacy campaigns centred on content rather than on the format’s duration itself.
The generation that grew up with a thumb trained to swipe before finishing a sentence did not choose that training, any more than it chose the phone in its own hand at age nine or ten. No one asked whether it wanted to learn to wait. It received it from a system that competes for every second of its attention, a system already documented in detail, with an engineer’s name, an invention date, a jury and a verdict. What is missing is not understanding how the machine works, gear by gear. That is already known. What is missing, in Colombia and across much of Latin America, is measuring with its own figures how much of the capacity to wait has already been lost…
A.B.
Sources
- Feeds, Feelings, and Focus: A Systematic Review and Meta-Analysis Examining the Cognitive and Mental Health Correlates of Short-Form Video Use, Psychological Bulletin, 2026
- Feeds, feelings, and focus: A systematic review and meta-analysis examining the cognitive and mental health correlates of short-form video use, APA PsycNet
- Digital 2025: Colombia, DataReportal
- Uso seguro y responsable de redes sociales, TikTok, Instituto Colombiano de Bienestar Familiar (ICBF)
- Declaran a Meta y Google responsables en un juicio histórico sobre la adicción a las redes sociales, LA NACION
- Meta and YouTube found liable in social media addiction trial, CNN Business
- Los Angeles social media addiction trial: Jury finds Meta and YouTube liable, awards $6 million in damages, ABC7 San Francisco
- Ingeniería del vicio, cuando Silicon Valley convirtió a los niños en producto, AcidReport
