Teenagers struggling with the pressures of modern life are now facing an additional challenge—nighttime smartphone use, which is contributing to a worrying rise in mental health issues. A study conducted by the University of South Australia’s Behaviour-Brain-Body Research Centre reveals that Australian teens are increasingly losing sleep due to their addiction to digital devices, with girls particularly affected.
The research surveyed over 50,000 primary and secondary school students aged between 7 and 19 years, uncovering a disturbing link between nighttime phone habits, cyberbullying, and stress levels. It found that 66% of teenage girls and 58% of teenage boys have experienced cyberbullying at least once during the last school term. Among these, a significant number are also struggling with inadequate sleep—17% of the girls and 13% of the boys reported getting less than eight hours of sleep per night.
The lack of sleep is taking a toll, especially on teenage girls, who are more likely to be frequent users of smartphones at night. Dr. Stephanie Centofanti, a UniSA researcher and co-author of the study, pointed out that this age group is highly vulnerable as they start using social media earlier and more intensively than others.
“Girls are particularly at risk because their phone use at night peaks during early adolescence, a time when they are not fully equipped to handle the psychological pressures of social media,” Dr. Centofanti explains.
The study also highlighted the broader issue of stress among young people, with 38% of teenage girls and 23% of teenage boys reporting moderate-to-severe stress levels. This stress is exacerbated by the experience of cyberbullying, which was reported by 15% of the children in the study. A striking 75% of those who had been cyberbullied admitted to checking their phones throughout the night, a habit that only deepens the cycle of anxiety and poor mental health.
While primary school children (aged 7-11 years) are less exposed to cyberbullying and nighttime phone use, one in five still reported significant stress. The findings underscore the importance of managing digital device use at home, particularly in ensuring that children get enough sleep.
The implications of this study are clear—parents must be vigilant about their children’s smartphone use, particularly during the night. Ensuring adequate sleep and reducing exposure to the stresses of online interactions are crucial steps in safeguarding the mental health of young Australians.
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