Screen time robs average toddler of hearing 1,000 words spoken by adult a day, study finds
The average toddler is missing out on hearing more than 1,000 words spoken by an adult each day due to screen time, setting back their language skills, a firstof-its kind study has found.
The research, published on Tuesday in the Journal of the American Medical Association (Jama) Pediatrics, tracked 220 Australian families over two years to measure the relationship between family screen use and children’s language environment.
Families recorded all the audio around their child using advanced speech recognition technology over a 16-hour period on an average day at home. They repeated this process every six months between the ages of 12 and 36 months.
The lead researcher, Dr Mary Brushe from the Telethon Kids Institute, said: “The technology we use is essentially like a Fitbit, but instead of counting the number of steps, this device counts the number of words spoken by, to and around the child.”
The device also picked up electronic noise, which the researchers analysed to calculate screen time.
The researchers found young children’s exposure to screens including TVs and phones was interfering with their language opportunities, with the association most pronounced at three years of age.
For every extra minute of screen time, the three-year-olds in the study were hearing seven fewer words, speaking five fewer words themselves and engaging in one less conversation.
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The study found the average threeyear-old in the study was exposed to two hours and 52 minutes of screen time a day. Researchers estimated this led to those children being exposed to 1,139 fewer adult words, 843 fewer child words and 194 fewer conversations.
Because the study couldn’t capture parents’ silent phone use, including reading emails, texting or quietly scrolling through websites or social media, Brushe said they might have underestimated how much screen usage is affecting children.
A language-rich home environment was critical in supporting infants and toddlers’ language development, Brushe said. While some educational children’s shows were designed to help
children’s language skills, very young kids in the age group of the study could struggle to translate television shows into their own life, she said.
This study did not differentiate between whether children were watching high- or low-quality screen content.
Previous research in the area had relied on parents self-reporting their own and their child’s screen time, and only studied short periods of time.
“To our knowledge, no studies conducted since the rapid uptake of mobile phones and tablets have actually tracked children’s screen time and their early language experiences over an extended period of time,” Brushe said.
Prof Angela Morgan, the leader of the speech and language group at the Murdoch Children’s Research Institute, which was not involved in the study, said: “To my knowledge it’s the most robust examination of looking at screen time and interactions between parents and children that we’ve had available.
“For all children, the biggest opportunities for language learning are of course in those first few years of life … we know that early predictors do predict your later language outcomes, so it is really important that they’ve been looking at this question in the early years.”
Amber Flohm, the vice-president of the NSW Teachers Federation, said members who taught in early education and primary school had said how children were affected significantly by the increased amount of time spent on screen.
Flohm said teachers had noted language skills going backwards, both in conversation between children themselves and teachers and in reading and writing skills. The pandemic exacerbated the situation, but teachers had noted the trends around the increased used of screen time “at least the last five or six years pre-Covid”, she said.
The research in the study was carried out between 2018 and 2021, with some families undertaking their 30- or 36-month recording day early in the pandemic. However, researchers said participants’ average screen times did not appear to have increased substantially compared with those who completed their recordings prior to the pandemic.
Due to the advanced speech recognition technology only being able to code for English, only English-speaking households were part of the study.