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Dr. Pamela Rutledge's avatar

The risks of any media use is dependent on a lot of things, including the broader social zeitgeist because: 1) people worry about their kids (which is a good thing) which makes them hypersensitive to information about potential danger and that 2) historically, new technology causes a fear response and moral panic. There are many people who absolutely believe that all technology is bad or that children under 14 should not have a phone and many other things that are emotional reactions not empirically supported conclusions. The bottom line is that 1) young people's brains are still developing until their mid-20s, so they are more vulnerable and 2) while results are not conclusive, research on the negative impact of technology such as smartphones on brain development is related to excessive use and individual differences. Thus, as with most things, balance is the key. A phone should include oversight to make sure that the phone isn't replacing other activities and an open line of communication to touch base regularly and so the child will come to you if they run into problems or things that they don't know how to handle. Helping children build self-control and self-regulation is probably the most valuable skills (other than being a nice person) you can teach them.

As a parent, start with making a judgment about smartphone use based upon the child's maturity (are they old enough to responsible) and how and why they think they need a phone. Based on the child's maturity and use intentions, create a technology 'contract' or agreement so that the privilege of a phone is clearly set out and understood, negotiated and signed by both parties. Included in this contract should be: time limits, no phone in bed, no phone at the dinner table, who pays if the phone gets lost, and some basic instruction in digital literacy (being a good citizen, critical thinking skills for evaluating content and what to do in the event of direct or observed bullying.) If the rationale for a smartphone is valid but the child doesn't have the maturity for digital literacy skills and online safety, I'd look for a phone with restricted capabilities such as the Gabb Phone or Bark Phone.

Research on media effects of any kind is very difficult because it relies on correlational data and self-report usage data. Neurological studies have small samples due to legitimate challenges (expense, recruitment, etc.) Research also varies in how they define the things they are measuring. For example, I get a lot of questions about screen time, but what screens does that mean? Does it include movie theaters and televisions or just computers, tablets and smartphones? Research also shows that screen time (however you choose to measure it) is not a very effective measure. How screens are used (active, passive, for research or social connection, for entertainment or utility functions (learning stuff). Evidence suggests that kids benefit from some amount of socializing on a phone, but not too much, like Goldilocks.)

It's also important to look at research in context. For example, the reward response and it's role in addiction is often used as an argument in the smartphone debate (esp. if you watched the Social Dilemma https://drpam.substack.com/p/the-social-dilemma-fact-or-manipulation).

However, few people mention confounding variables, such as that adolescence is characterized by both heightened neural responses to rewarding stimuli and behavioral bias toward immediate reward. In other words, teens have a bias toward immediate reward with or without a phone. So while there are several studies on the impact of technology generally on childhood brain development, they are limited, and most researchers will tell you that it's early to draw conclusions. Students who spent more time checking their social media more regularly showed greater neural sensitivity in parts of the brain like the amygdala, however the researcher noted that it wasn't clear if that could lead to later compulsive social media behaviors, or it could reflect an adaptive neural change that helps teens navigate their social worlds (See also this response: https://substack.com/@drpam/note/c-43834509?utm_source=notes-share-action&r=1ffgg)

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Tian Wen's avatar

Can you tell more about the risks to children of having a smartphone? Maybe you’ve addressed that in a newer post? I’m thinking both in terms of social media, but also how using a digital device changes brain development, eg video games provide constant “rewards.”

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