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Summary: Preschoolers who watch more TV, and have TV’s in their bedrooms have significantly shorter sleep duration, lower quality of sleep and tend to nap for longer during the daytime.
Source: University of Massachusetts Amherst
Preschoolers who watch TV sleep significantly less than those who don’t, according to new research by the University of Massachusetts Amherst neuroscientist Rebecca Spencer and developmental science graduate student Abigail Helm.
More surprising to Spencer, known for her groundbreaking research into the role of naps in children’s memory and learning, 36 percent of 3- to 5-year-olds had TVs in their bedroom, and a third of those kids fell asleep with the TV on, often watching stimulating or violent adult programming.
The study, published in Sleep Health, the journal of the National Sleep Foundation, suggests that TV use by young children affects the quality and duration of sleep, measured for the first time by an actigraphic device kids wore like a watch on their wrist. Moreover, while daytime napping was found to increase among the kids who watched the most TV, it did not fully compensate for the lost sleep at night.
“The good news is, this is addressable,” says Spencer, referring to the opportunity to educate parents about the new, myth-shattering evidence that TV does not help young children fall asleep.
“Parents assumed that TV was helping their kids wind down. But it didn’t work. Those kids weren’t getting good sleep, and it wasn’t helping them fall asleep better. It’s good to have this data.”
The findings of Spencer and Helm come on the heels of new guidelines from the World Health Organization (WHO), which say children between age 2 and 4 years should have no more than one hour of “sedentary screen time” daily – and less or no screen time is even better. Similarly, the American Academy of Pediatrics suggests that daily screen time for 2- to 5-year-olds be limited to one hour of “high-quality programs,” and that parents should watch the programs with their children. The WHO also emphasized the importance of young children getting “better quality” sleep for their long-term health.
Some 54 percent of kids in the UMass Amherst study are not meeting the WHO’s TV-viewing guidelines on weekdays, and the figure jumps to 87 percent on weekends, Spencer says.
In addition to a dearth of data on TV viewing and sleep among this age group, previous research that does exist has relied on parent-reported measures of sleep, and “parents tend to overestimate sleep duration,” according to the study. “One of the biggest advantages we have in our approach is the use of these actigraphs,” which have been found to provide a reliable measure of sleep, Spencer says.
The new research piggybacked on Spencer’s larger study about young children’s sleep and cognition, supported by a National Institutes of Health grant. “Given that we already have some data about why sleep and naps are important for young kids, we decided to look into what are the factors that determine when they sleep, how they sleep and why they sleep,” Spencer says.
A “very diverse” group of 470 preschoolers from Western Massachusetts participated in the study, wearing actigraphs for up to 16 days. Their parents and caregivers answered questionnaires about demographics and the children’s health and behavior, including detailed questions on TV use. Among the findings:
Spencer says she plans to expand future child sleep studies to examine the impact of hand-held digital devices, such as iPads and smartphones. She also points out that TV use by kids as reported by their parents is likely to be underestimated.
“I think TV is its own beast to understand,” she says.
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Source: University of Massachusetts Amherst Media Contacts: Patty Shillington – University of Massachusetts Amherst Image Source: The image is credited to UMass Amherst.
Original Research: Closed access “Television use and its effects on sleep in early childhood”. Abigail F. Helm MS, Rebecca M. C.Spencer PhD. Sleep Health. doi:10.1016/j.sleh.2019.02.009
Television use and its effects on sleep in early childhood Objectives The purpose of this study was to investigate the impacts of television (TV) viewing and bedroom TV presence on young children’s sleep as measured by actigraphy.
Design Analyses of covariance were run to examine differences in sleep duration and quality among children based on the presence of TVs in their bedrooms and the amount of TV watched.
Setting Recruited in preschools in Massachusetts; recorded ambulatory (in home, environs).
Participants Participants were 470 children between 33 and 71 months of age (M = 51.02).
Measurements Children were instructed to wear an actigraph watch for 16 days. Caregivers reported demographic information, completed behavior questionnaires, and answered questions regarding their child’s TV use.
Results Children who watched more TV and had TVs in their bedroom displayed significantly shorter sleep duration and worse sleep, but they also napped significantly longer in the daytime. Nonetheless, total 24-hour sleep was shorter for those who watched more TV and had TVs in their bedroom compared to those who did not have TVs in their bedrooms or watch TV frequently. Children who had TVs in their bedrooms watched TV later at night, watched more adult TV programs, and had higher negative affect than children without TVs in their bedrooms.
Conclusions These findings suggest that TV use in young children does impact sleep duration and quality as measured by actigraphy, and daytime napping does not offset these negative impacts.
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