The following is excerpted from an online article posted by MedicalXpress.
Researchers at Karolinska Institutet in Sweden have studied how the screen habits of U.S. children correlate with how their cognitive abilities develop over time. They found that the children who spent an above-average time playing video games increased their intelligence more than the average, while TV watching or social media had neither a positive nor a negative effect. The results are published in the journal Scientific Reports.
More than 9,000 boys and girls in the U.S. participated in the study. At the age of nine or ten, the children performed a battery of psychological tests to gauge their general cognitive abilities (intelligence). The children and their parents were also asked about how much time the children spent watching TV and videos, playing video games, and engaging with social media.
Just over 5,000 of the children were followed up after two years, at which point they were asked to repeat the psychological tests. This enabled the researchers to study how the children’s performance on the tests varied from one testing session to the other and to control for individual differences in the first test. They also controlled for genetic differences that could affect intelligence and differences that could be related to the parents’ educational background and income.
On average, the children spent 2.5 hours a day watching TV, half an hour on social media, and 1-hour playing video games. The results showed that those who played more games than the average increased their intelligence between the two measurements by approximately 2.5 IQ points more than the average. No significant effect was observed, positive or negative, on TV-watching or social media.
“We didn’t examine the effects of screen behavior on physical activity, sleep, well-being, or school performance, so we can’t say anything about that,” says Torkel Klingberg, professor of cognitive neuroscience at the Department of Neuroscience, Karolinska Institutet. “But our results support the claim that screen time generally doesn’t impair children’s cognitive abilities and that playing video games can actually help boost intelligence. This is consistent with several experimental studies of video-game playing.”