A new study from UNSW Sydney quietly reframes one of the defining anxieties of modern parenthood: it is not the presence of social media in a young person's life that most threatens their wellbeing, but the age at which they first encounter it. Surveying 365 Australian adolescents in the weeks before a national social media ban took effect, researchers found that those who began using platforms in early childhood carried measurably heavier burdens of anxiety and depression — regardless of whether they held an active account at the time of the study. The finding shifts the moral weight of the c
Age of First Social Media Use Matters More Than Access, UNSW Study Finds
Adolescents who began using social media at younger ages reported elevated symptoms of anxiety and depression.
When children first start matters more than whether they start at all
Mark
So the study found that 70 percent of these kids had used social media. That's a lot. But the real finding is about timing, not access?
Mimi
Right. The researchers were looking at two separate things: whether a teenager had ever used social media, and how old they were when they first did. Those turned out to be different questions with different answers.
Luke
How different? What's the actual strength of the correlation between age of first use and mental health symptoms, versus having an account?
Mimi
The paper says the age of first use "appeared to matter more," but I'd want to see the effect sizes to know if we're talking about a huge difference or a meaningful but modest one.
Mark
The average first use was 11. So kids who started at, say, 9 were reporting more anxiety and depression than kids who started at 13?
Mimi
That's the pattern the survey found, yes. Earlier starters reported more symptoms.
Luke
But this is correlational data from a single snapshot in time, right? We don't know if early social media use caused the anxiety, or if anxious kids sought out social media earlier, or if there's a third factor.
Mimi
Correct. That's why the researchers are following these same young people forward. They want to see what actually changes now that the ban is in place.
Mark
And that's the real test—whether delaying first use actually improves mental health outcomes.
Luke
Exactly. The policy implication is interesting, but we won't know if it works until they have the follow-up data.
Mimi
Which is why Schweizer kept emphasizing this is the first stage. They're building the baseline before the policy takes full effect.
Il Polso
- Children who first opened a social media app at age 11 or younger are showing up in the data with significantly more anxiety and depression symptoms than those who came to it later.
- The assumption that simply having an account is the core risk has been quietly undermined — timing of first exposure is proving to be the sharper variable.
- Australia's December 2025 social media ban arrived as a blunt policy instrument, but this research suggests the more precise intervention may be delaying the age of first use rather than restricting access outright.
- Researchers, parents, and educators are being called into a shared responsibility — not just to limit screens, but to consciously postpone and prepare young people for their first digital social encounter.
- The same cohort of 365 teens will be tracked over the next year, offering a rare before-and-after window into whether the national ban actually moves the needle on youth mental health.
A new study from UNSW Sydney quietly reframes one of the defining anxieties of modern parenthood: it is not the presence of social media in a young person's life that most threatens their wellbeing, but the age at which they first encounter it. Surveying 365 Australian adolescents in the weeks before a national social media ban took effect, researchers found that those who began using platforms in early childhood carried measurably heavier burdens of anxiety and depression — regardless of whether they held an active account at the time of the study. The finding shifts the moral weight of the conversation from access to timing, suggesting that the first encounter with the digital social world is a threshold moment deserving far more deliberate care than society has yet given it.
In the weeks before Australia's social media ban took effect in December 2025, researchers at UNSW Sydney quietly gathered data that would complicate the policy debate rather than settle it. Their survey of 365 adolescents aged 10 to 15 — each accompanied by a parent — was designed to capture a baseline: who was using social media, when they had started, and what their mental health looked like.
Seventy percent of the young people had used social media at some point, with an average age of first use sitting at 11. About half held an active account at the time. When the researchers examined how these facts related to anxiety and depression symptoms, the pattern that emerged surprised even them: it was not current account ownership that most strongly tracked with poor mental health outcomes, but how young a person had been when they first logged on. Early starters reported noticeably more symptoms. The findings appeared in JAMA Network Open.
Lead author Anna Bilston and chief investigator Associate Professor Susanne Schweizer drew a pointed conclusion: protecting young people's mental health requires thinking carefully not just about whether they can access social media, but about when they first do. Restriction alone is insufficient — deliberate delay, paired with education in digital citizenship, may offer a more durable form of protection.
The study is only the beginning. The research team will follow the same cohort over the next year, measuring how the ban shapes behavior, attitudes, and exposure to online harms. Schweizer noted the unusual value of this moment: few countries have enacted such a policy, and fewer still have a tracked group of young people to observe before and after the change. What the data reveals may quietly reshape how governments and families think about the digital threshold every child eventually crosses.
Researchers at UNSW Sydney have found something counterintuitive in the debate over teenage social media use: when a young person first picks up an app may matter far more than whether they have access to one at all.
The discovery comes from a survey of 365 Australian adolescents between ages 10 and 15, conducted alongside one parent from each household. The timing was deliberate—the researchers gathered their data in the six weeks before Australia's social media ban took effect in December 2025, a policy introduced amid mounting concern about rising anxiety and depression among young people. The survey asked straightforward questions: Had the teenager ever used social media? If so, how old were they when they started? Did they currently have an account? Researchers also administered measures designed to detect symptoms of anxiety and depression.
The numbers that emerged were striking in their specificity. Seventy percent of the young people surveyed had used social media at some point. About half currently maintained an active account. The average age of first use across the group was 11 years old. But when the researchers looked at the relationship between these facts and mental health symptoms, a pattern emerged that surprised even the investigators: adolescents who began using social media earlier in childhood reported noticeably more symptoms of anxiety and depression. By contrast, simply having a social-media account at the time of the survey showed a much weaker connection to those same mental health measures. The findings were published in JAMA Network Open.
Associate Professor Susanne Schweizer, the study's chief investigator, framed the implication plainly: the age of first exposure appeared to matter more for mental health than access itself. This distinction carries weight in policy conversations. It suggests that delaying a child's initial encounter with social media, paired with deliberate teaching about digital citizenship and healthy online habits, might offer a more effective path forward than restriction alone.
Anna Bilston, the study's lead author and a PhD candidate at UNSW, pushed the thinking further. If protecting young people's mental health is the goal, she argued, governments and families cannot stop at controlling whether teenagers can reach social media. They must also think carefully about the age at which young people first begin using it. The responsibility extends beyond policy makers to parents and educators, who have a role in helping adolescents build sound digital habits and in postponing that first exposure.
This research represents only the opening chapter of a longer study. The researchers plan to follow the same cohort of young people over the next year, tracking how the Australian ban affects their behavior, attitudes, mental health, and exposure to online harms. Schweizer emphasized the rarity of this opportunity: few places in the world have implemented such a policy, and fewer still have the chance to measure its effects on a tracked group of young people before and after the change. The coming months will reveal whether the restrictions actually improve teenage mental health outcomes, and what adjustments might strengthen the policy further.
Citazioni salienti
The age children first started using social media appeared to matter more for their mental health than simply whether they had an account.— Associate Professor Susanne Schweizer, UNSW Sydney
If we want to protect young people's mental health, we need to think not only about whether they can access social media, but also about how young they are when they first start using it.— Anna Bilston, lead author and UNSW PhD candidate
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