Podcast Summary: Left To Their Own Devices

Episode Title: Brain Rot
Date: October 10, 2025
Host: Ava Smithing, Toronto Star
Main Theme:
This episode of Left to Their Own Devices investigates the neurological and psychological impacts of screens and social media on children and adolescents. Drawing from personal experiences, groundbreaking research, and interviews with leading experts, host Ava Smithing confronts the controversial idea that today's youth mental health crisis is a direct result of “phone-based childhood.” The episode evaluates popular narratives, new scientific findings, and the complex, sometimes contradictory evidence around the digital lives of young people.

Key Discussion Points & Insights

1. The “Great Rewiring” and Theories of Tech-Driven Mental Illness

• Explaining “The Great Rewiring”
  • Jonathan Haidt, social psychologist and author of The Anxious Generation, claims a sudden increase in youth mental illness (depression, anxiety, self-harm) began in the early 2010s—what he calls “the Great Rewiring.”
  • Quote:
    • "All of a sudden, in the early 2010s, their mental health collapsed." – Jonathan Haidt [00:20]
    • “The first act is the loss of the play-based childhood. Then we get Act 2, which is the arrival of the phone-based childhood.” – Haidt [00:28]
  • Haidt believes that nearly overnight, widespread adoption of smartphones and social media fundamentally altered how children grow up.
• Influence of Haidt’s Book
  • Haidt’s book has spurred global debate and even legislative proposals banning or restricting social media use for minors (e.g., Arkansas and Australia).
  • Quote:
    • “The wife of the Premier of South Australia read the book and...says, 'Peter, you've got to read this book and then you've got to fucking do something about it.' So he did.” – Haidt [02:51]

2. Scientific Controversy & Critique

• Skepticism on Causality
  • Despite Haidt’s popularity, many researchers question the evidence linking social media directly to youth mental health crises.
  • Quote:
    • “Everybody's like eating up the anxious generation and freaking out because basically it's bad science.” – Ava Smithing [03:17]
  • Dr. Sarah Coyne (Brigham Young University) questions why many social scientists disagree with Haidt, noting research doesn’t confirm a direct causal link. [03:29]

In-the-Lab: What Screens Do to Brains

3. Social Cognition Experiments with Teens

• Emma Dorden’s Brain Lab Studies

  • Emma Dorden (University of Western Ontario), neuroscientist, runs experiments to see how screen time and social media affect teenagers’ social cognition.
  • Pixar Video Test:
    • Teens watched an emotional short film while brain activity was monitored.
    • Result: Higher social media use correlated with lower social cognition (less empathy/understanding).
    • Quote:
      • “We found that the more those teens used social media, the less social cognition they had.” – Ava Smithing [07:32]

• Brain Activity During Scrolling

  • When kids scrolled Instagram Reels, their brains showed active, not passive, engagement—especially for sensational content.
  • Quote:
    • “When we are doing something like passive scrolling, it's not passive, it is impacting the brain.” – Dorden [09:11]

• Screen Time and Anxiety Levels

  • Dorden’s survey: Nearly half of 500 teens had clinically elevated anxiety; the biggest risk factor was passive scrolling.
  • Key Takeaway:
    • Limiting screen time to 2 hours/day and focusing on active, not passive, use may protect mental health. [10:49]
    • “The key message...limiting screen time to about two hours a day and then reducing passive scrolling...could be very key to protecting teen mental health.” – Dorden [10:49]

4. Does Social Media Cause Mental Health Decline? Longitudinal Studies

• Sarah Coyne’s 8-Year Study

  • Coyne’s within-subject, longitudinal study (ages 13–20) found no significant link between time spent on social media and later depression or anxiety.
  • Notable moment:
    • “I was actually really surprised by the results because we found no significant findings.” – Coyne [13:25]
  • Individual experiences on social media vary: What matters is the quality of interaction, not just time spent. [13:46]
  • For some kids, no social media increases risk of depression/anxiety—possible “Goldilocks effect.” [15:14]

• Complex Causes, Not Quick Fixes

  • "I think that narrative is based on fear tactics...This is not how we grew up...so it's scary and we don't know." – Coyne [15:54]

Relooking at the Roots: Are Screens a Symptom or a Cause?

5. Underlying Mental Health Issues & Screen Use

• Dr. Michael Rich (Digital Wellness Lab, Boston Children's Hospital):

  • Many “problematic” technology users have underlying conditions: ADHD, social anxiety, autism, depression.
  • For these kids, screens are self-soothing or provide social connection missing offline.
  • Quote:
    • "We actually see problematic interactive media use as a syndrome, as a set of symptoms of these underlying conditions...Our goal with [screens] is not abstinence, but self regulation." – Rich [19:56]

• Screen Time and Addiction: Not The Same

  • Rich criticizes the addiction framework, emphasizing the necessity of self-regulation and digital literacy, not abstinence. [19:56]

6. The Importance of "How" and "With Whom", Not Just "How Much"

• New Tools for Assessment: Dr. John Hutton’s “Screen Q”

  • Evaluates accessibility, content, and parental involvement with screens, not just overall duration.
  • High “Screen Q” scores correlate with worse cognitive and language development in very young children (under five). [23:38]

• Early Childhood Warnings

  • Kids under three should have no screen time; heavy use erodes white matter and social cognition (mirror neuron systems). [24:14]

7. Parental Role & Hypocrisy

• Parental Engagement Outweighs Surveillance

  • Rich’s clinic finds teens crave attention from parents more than phone policing.
  • Quote:
    • “Almost always the first thing out of their mouths is, pay more attention to me...Their parents are staring at that all important email on their phone while yelling at them to turn off Grand Theft Auto. To a kid, that's the height of hypocrisy.” – Rich [27:00]

• Family Connections Trump Controls

  • “A sit down family meal without devices every day—this is where we practice the original social media: conversation.” – Rich [27:37]

Memorable Quotes

• “It's a tragedy in two acts. The first act is the loss of the play-based childhood. Then...the arrival of the phone-based childhood.” – Jonathan Haidt [00:28]
• “Correlation isn't causation. Is social media causing mental health issues, or are kids drawn to it because they're already struggling?" – Ava Smithing [10:58]
• “You don't need alcohol to live, you don't need cocaine to live. I would argue that interactive media now is a necessary resource in kids lives.” – Michael Rich [19:56]
• “If you don't use it, you lose it. We gravitate to screens because they are easy...but we’re not exercising those parts of our brain we want to be building.” – Ava Smithing [25:47]
• “We may be better served by examining the more concrete harms of social media. Because as we're about to find out, those harms are very real and sometimes deadly.” – Ava Smithing [29:21]

Timestamps for Important Segments

• [00:02] Introduction to "The Great Rewiring" (Ava Smithing & Jonathan Haidt)
• [03:17] Scientific pushback: Critiquing Haidt's thesis
• [04:22] In the neuroscience lab – Emma Dorden’s research on social cognition
• [09:02] Brain activity when scrolling social media
• [10:14] Large teen survey: Passive scrolling and anxiety
• [13:08] Sarah Coyne’s 8-year longitudinal study: No direct link found
• [15:14] Goldilocks effect—some social media may be protective
• [17:05] Historical parallels: TV panic vs. smartphones
• [19:04] Michael Rich: Underlying psychological drivers of problematic use
• [23:13] John Hutton: Impact of screens on young kids’ brains
• [25:47] Importance of exercising brains offscreen
• [27:00] What kids want from parents: Real attention, not lecturing
• [28:17] Future research and evolving technology: AI and critical thinking

Summary & Takeaways

• No One-Size-Fits-All Answer: The impact of screens and social media is nuanced: risks differ vastly based on age, vulnerability, usage quality, and context.
• Evidence is Mixed: While compelling anecdotes and some research suggest harm (especially with heavy, passive use), high-quality longitudinal studies show no uniform effect on mental health.
• Underlying Issues Matter: For many teens, digital compulsions are a symptom, not a cause, of psychological struggles.
• Family Connection is Key: Engaged parenting and shared offline time are more impactful (and desired by teens) than strict surveillance.
• Younger Kids Are Most Vulnerable: Early, unsupervised, and high-quantity screen exposure can measurably harm rapidly developing brains.
• The Research Is Still Evolving: Science lags behind technology—so humility, caution, and active conversation are all essential as the evidence develops.
• Next Episode Preview: The real, concrete, sometimes deadly harms of social media—moving beyond statistics to lives affected by blackmail, exploitation, and more.

Overall Tone:
Inquisitive, open-minded, and nuanced, with skepticism toward both panic-driven narratives and techno-optimism. The speakers emphasize ongoing complexity and the need for empathy, evidence, and caring connections.