HoldsUp

The Diary Of A CEO · 2026-02-16 · Steven Bartlett (host), Jonathan Haidt, Aditi Nerurkar

Brain Rot Emergency: These Internal Documents Prove They’re Controlling You!

46 claims checked against research: 1 contradicted 9 overstated 4 needing context 14 supported 10 corroborated online 8 unverified

14

Supported by research

0:00:57Aditi Nerurkarsupportedmoderate

A study showed that 91% of adults experienced improvements in attention, well-being, or mental health after 2 weeks of using their device without internet access.

"For example, 91% of people had an improvement in attention, well-being, and mental health after just 2 weeks of continuing to use their device but not having internet access." (said at 0:00:57)

A 2025 randomized controlled trial published in PNAS Nexus investigated the effects of blocking mobile internet on smartphones for 2 weeks while allowing calls, texts, and non-mobile internet use. The authors reported that the intervention improved objectively measured sustained attention, subjective well-being, and mental health, with 91% of participants showing improvement in at least one of these outcome domains.

0:11:47Aditi Nerurkarsupportedmoderate

Screen-induced sleep disruption increases the risk of heart disease later in life.

"It is affecting your sleep, which increases your risk of heart disease later in life." (said at 0:11:47)

Large systematic reviews and meta-analyses of prospective cohort studies consistently demonstrate that chronic sleep deprivation and short sleep duration are associated with an increased risk of developing cardiovascular disease and coronary heart disease later in life.

0:16:23Steven Bartlett (host)supportedmoderate

A 2025 meta-analysis of 71 studies found that heavy short-form video use is associated with reduced thinking ability, shorter attention spans, and weaker impulse control.

"There was a meta-analysis done in 2025 of 71 different studies and it found that heavy short-form video use was associated with reduced thinking ability especially shorter attention spans and weaker impulse control." (said at 0:16:23)

A 2025 systematic review and meta-analysis published in Psychological Bulletin analyzed 71 studies encompassing 98,299 participants to assess cognitive and mental health correlates of short-form video (SFV) use. The meta-analysis found that increased SFV use was associated with poorer cognitive performance overall (mean effect size r = -0.34), with attention (r = -0.38) and inhibitory control (r = -0.41) exhibiting the strongest negative associations. As the included evidence is primarily observational and cross-sectional, these findings establish significant correlational links rather than definitive causal relationships.

0:38:18Jonathan Haidtsupportedmoderate

The Chinese version of TikTok (Douyin) imposes specific limits on minors, including night shut-offs and algorithms that prioritize educational and patriotic content.

"it was a Chinese company that gave Chinese kids healthy TikTok, or Douyin. They, you know, learned to follow astronauts. Their algorithm feeds their kid patriotic stuff. It shuts off at a certain time at night. There's all kinds of limits." (said at 0:38:18)

Published analyses of Chinese digital platforms confirm that ByteDance operates Douyin under Chinese regulatory frameworks that differ substantially from its international counterpart TikTok. Research on Douyin's platform architecture and content governance documents how the platform actively integrates state-aligned ideological content, including dedicated curation mechanisms for 'positive energy' and patriotic messaging, and adapts platform affordances to comply with domestic regulations governing minor access and screen time.

  • supports: # PositiveEnergy Douyin: constructing “playful patriotism” in a Chinese short-video applic… (Chinese Journal of Communication 2020) · cited 209x in the literature
    "Douyin even created a separate trending section, Positive Energy, for videos that promoted the dominant state ideology. This study argues that the Positive Energy feature on Douyin is significant. The Chinese government has accused and even permanently shut down several digital platforms for spreading “vulgarity” as the antithesis of positive energy. Using the app walkthrough method and a content analysis of over 800 videos collected from the Positive Energy section of Douyin, this study explores how Douyin promotes the Chinese state’s political agenda by promoting a new form of playful patriotism online." (abstract, passage verified)
    openalexfull study (doi)
  • supports: The co-evolution of two Chinese mobile short video apps: Parallel platformization of Douyi… (Mobile Media & Communication 2020) · cited 480x in the literature
    "TikTok is the international twin of China’s mobile short video app, Douyin, and one of the fastest growing short video platforms in the world. Owned by Chinese tech giant, ByteDance, TikTok and Douyin share many similarities in terms of appearance, functionality, and platform affordances; however, they exist in radically different markets and are governed by radically different forces. Unlike other popular mobile media platforms in China and internationally, TikTok and Douyin are neither part of the big three tech giants in China nor the big five in the US. This provides an interesting case study to investigate how an emerging internet company adapts its products to better fit divergent expectations, cultures, and policy frameworks in China and abroad." (abstract, passage verified)
    openalexfull study (doi)
0:43:47Jonathan Haidtsupportedmoderate

Developing secure attachment in childhood makes an individual more likely to exhibit secure attachment in adult romantic relationships.

"And the internal working models you develop as a child are the models that you will reuse in puberty for romantic relationships. And so, if you are securely attached as a child, you're more likely to be securely attached as an adult on the dating market" (said at 0:43:47)

Prospective longitudinal studies tracking individuals from infancy into adulthood support the claim that childhood attachment security predicts adult romantic attachment security. In multi-decade cohorts (such as the Minnesota Longitudinal Study of Risk and Adaptation and the NICHD SECCYD cohort), infants assessed as securely attached via the Strange Situation or experiencing higher-quality early mother-child relationships were significantly more likely in adulthood to show secure romantic attachment representations on the Current Relationship Interview, exhibit lower romantic attachment anxiety and avoidance, and have higher-quality romantic interactions.

1:14:42Jonathan Haidtsupportedhigh

US National Assessment of Educational Progress (NAEP) test scores rose from the 1970s through 2012, and began declining around 2015 before the COVID-19 pandemic.

"From the '70s through 2012, they were rising. We actually were improving what kids knew, what kids learned in the United States. We have very good data, the national the NAEP, National Assessment of Educational Progress. Goes up till 2012. And then by 2015, it starts going down and it's going down before COVID. And it goes down more during COVID." (said at 1:14:42)

Analyses of long-term trend and main assessment data from the National Assessment of Educational Progress (NAEP) show that nationwide student academic performance across mathematics and reading rose substantially from the early 1970s through approximately 2012, before leveling off and turning downward around 2015 (prior to the COVID-19 pandemic), with accelerated score declines following the onset of COVID-19 disruptions.

1:23:18Jonathan Haidtsupportedmoderate

Research (including Dutch studies) indicates heavy electronic and social media use does not cause ADHD de novo in children without a predisposition, but worsens symptoms in children who already have ADHD.

"I looked to see if there were studies indicating that uh heavy use of social media and video games and all the electronic stuff caused ADHD. And when I was doing the research in 2023, I did not find evidence that it will give a kid ADHD who otherwise wouldn't have it. What I did find was evidence that for kids who have ADHD, when you let them have the devices, the video games, all that, their symptoms get much worse." (said at 1:23:18)

Systematic reviews and longitudinal studies (including prominent Dutch research by Valkenburg, Nikkelen, Boer, and colleagues) support the distinction made by the speaker. ADHD is a highly heritable neurodevelopmental disorder, and meta-analytic evidence indicates only a small overall correlation (r ≈ 0.12) between general media use and ADHD-related behaviors, with no evidence that screen or social media use creates ADHD de novo in children without underlying neurodevelopmental predisposition. Instead, research supports the Differential Susceptibility to Media effects Model, showing that children with pre-existing ADHD traits or problematic media use patterns are disproportionately susceptible to symptom exacerbation and compulsive engagement.

1:25:22Aditi Nerurkarsupportedmoderate

There is an increasing trend of adults in their 30s, 40s, 50s, and 60s receiving new diagnoses of ADHD.

"increasingly we're seeing more and more adults who are in their 30s and 40s, 50s, sometimes even 60s who are being diagnosed, newly diagnosed with ADHD." (said at 1:25:22)

Large population-based observational cohort studies across multiple countries document substantial, ongoing increases in the incidence and prevalence of new adult ADHD diagnoses across young, middle-aged, and older adult age brackets (including individuals in their 30s, 40s, 50s, and 60s). For example, a longitudinal cohort of over 5.2 million adults in the US found the incidence of new adult ADHD diagnoses rose from 9.43 to 13.49 per 10,000 person-years between 2007 and 2016, with overall prevalence more than doubling. Similarly, a Swedish registry study tracking over 5 million adults aged 25 to 61 years found an average annual percentage increase of 18.8% in ADHD incidence between 2004 and 2019, while Canadian and UK primary care registry data also demonstrate significant increases in newly diagnosed adult cases.

1:16:40Steven Bartlett (host)supportedhigh

The term 'brain rot' was named Oxford Word of the Year 2024.

"a 2022 Munich study which tested the idea of brain rot, which um I believe was the Oxford dictionary word of the year 2024." (said at 1:16:40)

Oxford University Press officially selected "brain rot" as the Oxford Word of the Year for 2024, reflecting widespread public and academic discussion surrounding the cognitive effects of consuming excessive low-quality digital media.

1:30:26Aditi Nerurkarsupportedmoderate

A lifespan brain study analyzing subjects from birth to age 90 identified five distinct developmental stages, defining adolescence as lasting from age 9 to age 32.

"It looked at I think it was 1,000 people from age zero, so birth all the way to 90. So the entire population and it looked at lifespan and said there are actually five stages. So first is childhood, zero to age nine... 9 to 32 is considered adolescence. And so, you know, 32 is when adolescence ends apparently according to the study." (said at 1:30:26)

A 2025 lifespan neuroimaging study analyzed brain structural connectome topology using diffusion imaging in 4,216 individuals aged 0 to 90 years. The study identified four major topological turning points at approximately ages 9, 32, 66, and 83, defining five distinct epochs across the lifespan, with the second developmental epoch spanning from age 9 to age 32.

1:30:57Aditi Nerurkarsupportedmoderate

A lifespan brain study identified that the adulthood stage of brain development spans ages 33 to 66 with stable brain efficiency, followed by early aging from 66 to 83 and late aging from 83 onward.

"And then the next stage is from 33 to I think 66 is like adulthood. Things are very stable. Learning is stable and you know, it's efficient and things are doing well. And then— [1:31:28] GUEST1: We're productive. [1:31:28] GUEST2: Yeah, 66 to about 83 is early aging. And so that's when you see some of the age-related changes. And then 83 plus is late aging." (said at 1:30:57)

A large-scale neuroimaging study evaluating structural brain connectomics and graph theory metrics across the lifespan (N = 4,216, ages 0 to 90) identified four major turning points in structural brain topology at approximately ages 9, 32, 66, and 83. These transition points demarcate five distinct epochs of brain development: childhood (0–9), adolescence/young adulthood (9–32), adulthood (around 32/33 to 66), early aging (66 to 83), and late aging (83 and older). During adulthood (spanning ages ~32/33 to 66), network topology and brain efficiency metrics remain largely stable, prior to the onset of accelerated topological reorganization in early and late aging.

2:01:41Jonathan Haidtsupportedmoderate

Survey data shows agreement with the statement that life feels meaningless among high school seniors remained around 8% to 9% until spiking significantly starting around 2013.

"And the saddest one is the one my life feels meaningless. Um do you agree with that? Disagree with it? And the percent that agree, uh I think it's you know, something like 8% or 9% uh you know, agreed for the millennial generation. I think it's in chapter seven, the end of chapter seven. And then it's what's fairly flat and then all of a sudden we hit this period, the great re-wiring, 2010 to 2015. Uh so right around 2013 it goes way, way up." (said at 2:01:41)

Nationally representative survey data from the Monitoring the Future study of U.S. 12th-grade high school seniors support the claim. Studies analyzing these data show that depressive symptoms—measured using affective items including the belief that "Life often seems meaningless"—remained relatively low and stable across earlier birth cohorts before rising sharply starting around 2010 to 2012.

2:02:34Jonathan Haidtsupportedmoderate

Adolescents spend an average of 5 hours per day on social media and 8 to 10 hours per day on digital devices excluding schoolwork.

"5 hours a day is the average for social media, 8 to 10 on on devices not counting school, if all you're doing is just you're just consuming content, you are useless." (said at 2:02:34)

The speaker's figures closely reflect nationally representative survey findings on adolescent media habits in the United States. Major surveys show that U.S. teens spend an average of approximately 4.8 hours per day specifically on social media platforms (Gallup Youth Survey) and an average of 8 hours and 39 minutes per day on screen media for entertainment, excluding time spent on schoolwork or homework (Common Sense Media Census). Large population-based studies tracking child and adolescent media use similarly evaluate heavy recreational screen exposure in cohorts reaching 7 or more hours per day.

2:11:35Aditi Nerurkarsupportedlow

While hedonic happiness is subject to the hedonic treadmill where pleasure habituates, eudaimonic happiness does not exhibit a hedonic treadmill effect.

"Because in your brain, there's something called the hedonic treadmill. And the treadmill is a thing in your brain where, no matter what you do, this is like the Instagram lifestyle, right? No matter what happens, you need more of it. You need more of it. Same thing with brain rot. And that is because that you can never get enough. And it's the hedonic treadmill. But you do not have a treadmill for eudaimonic happiness." (said at 2:11:35)

In well-being research and positive psychology, hedonic happiness (pleasure, sensory rewards, positive affect) is characterized by hedonic adaptation—often termed the 'hedonic treadmill'—where individuals rapidly habituate and return to a baseline set point. In contrast, eudaimonic well-being (derived from meaning, purposeful living, personal growth, and altruism) operates largely outside homeostatic hedonic adaptation, providing sustained increases in psychological well-being without the characteristic habituation of the hedonic treadmill. Evidence supporting this distinction primarily stems from psychological models and theoretical frameworks.

Unverified means no publication matching the claim was located; it does not prove the claim false. Spotted an error? See the corrections policy - disputes from the people quoted are prioritized.