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Two caucasian brothers, 13 and 9 years old, sitting playing electronic pocket, inside a blue wall and looking in profile, candid
A new study on children in the United States, published in The Lancet Child & Adolescent Health, finds that when they spend more than two hours on screens every day, they tend to have worse results on cognition tests. This may not be a total shock, given the research done in recent years – and a lot of anecdotal evidence – but it's nice to have more confirmation in the form of research results.
The study, conducted by researchers from the Research Institute of the Children's Hospital of Eastern Ontario, examined data from 4,500 children aged 8 to 11 in 20 communities across the United States. Their parents answered questions about their usual use of the screen, their sleep and their time spent on physical activity. The children also took a cognitive test measuring executive function, attention, working memory, episodic memory, language and processing speed.
Few children have complied with current recommendations regarding screen time (two hours or less per day), sleep (9 to 11 hours / night) or physical activity (60 minutes / day). Only half of the patients received the recommended amount of sleep, 37% responded to recommendations for screen time and 18% met the exercise recommendation. Nearly 30% did not encounter any; 5% met all three. The average duration of the screen per day was 3.6 hours.
Interestingly, the fact of only complying with the recommendation of physical activity, but not the other two (that is, children who benefited from the recommended amount of exercise, but not sleep) has shown no connection to cognition – which is strange because exercise is said to be beneficial for cognition. . It is possible that even if a child is exercising, spending too much time on the screens and not getting enough sleep may negate the benefits of physical activity.
Indeed, meeting only the screen time recommendation (less than two hours) was linked to higher scores on cognitive tests. Even better was the time spent in front of the screen and the recommendations on sleep – this combination had the strongest correlation with cognitive function.
The authors attempted to consider variables that could affect outcomes, such as parental education, household income, ethnicity, body mass index, and other factors. But it is possible that there are other interactions, and after all, the study is only a correlation. Another limitation is that the data was collected only at the beginning of the study, not in time.
But there is a certain logic in the idea that the time spent on the screen could affect cognition. The author of an editorial coach, Eduardo Esteban Bustamante, from the University of Illinois, says it well: "Every minute spent on screens necessarily distances a minute of sleep or cognitively stimulating activities. "That sounds pretty logical. And he adds that stress recovery, or lack thereof, can further explain the connection.
"Through an optics of adaptation to stress", he writes, "the strong associations between global cognition and respect for the recommendation on the time spent in front of a screen of leisure found by [the authors] potentially reflect the interruption of the stress recovery cycle necessary for growth in children who do not respond to the recommendation. "
He adds that adults tend to streamline the time spent in front of a screen saying that it is educational or rewarding. And it can be– but probably not enough to justify the time most children use. As Bustamante says: "It is tempting to be comforted by the fact that cognitively stimulating screening activities can be beneficial for cognition, but that, if they had the choice, most children are already choosing in a consistent and predictable way. Filtering activities more stimulating than less stimulating ones. "
Other studies in recent years have suggested a consistent link between screen time and mental health issues, including depression and suicidality, a distinct but potentially linked link. Some application developers and social media sites have recently expressed regret for what they have created and even banned their own children from using them.
There is probably a complex interaction between screen time, psychological and social health, physical activity, and cognition. While science is still figuring it out, go with what the research says so far – and what your instinct says about the time that the screen can do for children's brain development.
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Two caucasian brothers, 13 and 9 years old, sitting playing electronic pocket, inside a blue wall and looking in profile, candid
A new study on children in the United States, published in The Lancet Child & Adolescent Health, finds that when they spend more than two hours on screens every day, they tend to have worse results on cognition tests. This may not be a total shock, given the research done in recent years – and a lot of anecdotal evidence – but it's nice to have more confirmation in the form of research results.
The study, conducted by researchers from the Research Institute of the Children's Hospital of Eastern Ontario, examined data from 4,500 children aged 8 to 11 in 20 communities across the United States. Their parents answered questions about their usual use of the screen, their sleep and their time spent on physical activity. The children also took a cognitive test measuring executive function, attention, working memory, episodic memory, language and processing speed.
Few children have complied with current recommendations regarding screen time (two hours or less per day), sleep (9 to 11 hours / night) or physical activity (60 minutes / day). Only half of the patients received the recommended amount of sleep, 37% responded to recommendations for screen time and 18% met the exercise recommendation. Nearly 30% did not encounter any; 5% met all three. The average duration of the screen per day was 3.6 hours.
Interestingly, the fact of only complying with the recommendation of physical activity, but not the other two (that is, children who benefited from the recommended amount of exercise, but not sleep) has shown no connection to cognition – which is strange because exercise is said to be beneficial for cognition. . It is possible that even if a child is exercising, spending too much time on the screens and not getting enough sleep may negate the benefits of physical activity.
Indeed, meeting only the screen time recommendation (less than two hours) was linked to higher scores on cognitive tests. Even better was the time spent in front of the screen and the recommendations on sleep – this combination had the strongest correlation with cognitive function.
The authors attempted to consider variables that could affect outcomes, such as parental education, household income, ethnicity, body mass index, and other factors. But it is possible that there are other interactions, and after all, the study is only a correlation. Another limitation is that the data was collected only at the beginning of the study, not in time.
But there is some logic in the idea that time spent in front of a screen can affect cognition. The author of an editorial coach, Eduardo Esteban Bustamante, from the University of Illinois, says it well: "Every minute spent on screens necessarily distances a minute of sleep or cognitively stimulating activities. "That sounds pretty logical. And he adds that stress recovery, or lack thereof, can further explain the connection.
"Through an optics of adaptation to stress", he writes, "the strong associations between global cognition and respect for the recommendation on the time spent in front of a screen of leisure found by [the authors] potentially reflect the interruption of the stress recovery cycle necessary for growth in children who do not respond to the recommendation. "
He adds that adults tend to streamline the time spent in front of a screen saying that it is educational or rewarding. And it can be– but probably not enough to justify the time most children use. As Bustamante says: "It is tempting to be comforted by the fact that cognitively stimulating screening activities can be beneficial for cognition, but that, if they had the choice, most children are already choosing in a consistent and predictable way. Filtering activities more stimulating than less stimulating ones. "
Other studies in recent years have suggested a consistent link between screen time and mental health issues, including depression and suicidality, a distinct but potentially linked link. Some application developers and social media sites have recently expressed regret for what they have created and even banned their own children from using them.
There is probably a complex interaction between screen time, psychological and social health, physical activity and cognition. While science is still figuring it out, go with what the research says so far – and what your instinct says about the time that the screen can do for children's brain development.
