Screen time and young children: Promoting health and development in a digital world
Posted: Jun 1 2017
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The digital landscape is evolving more quickly than research on the effects of screen media on the development, learning and family life of young children. This statement examines the potential benefits and risks of screen media in children under 5 years old, focusing on developmental, psychosocial and physical health. Evidence-based guidance to optimize and support children’s early media experiences involves four principles: minimizing, mitigating, mindfully using and modelling healthy use of screens. Knowing how young children learn and develop informs best practice strategies for health care providers.
Keywords: Development; Digital media; Health; Infant; Preschool child; Screen time
Background and methodology
Exposure to digital media in Canadian family life is increasing, as are concerns about how screen time affects children and families. This statement examines potential benefits and risks of screen exposure and use on children under 5 years, and provides evidence-based guidance for health professionals to help families. ‘Screen time’ refers to time spent with any screen, including smart phones, tablets, television, video games, computers or wearable technology. ‘Digital media’ refers to content transmitted over the Internet or computer networks on all devices, unless particular ones are specified.
A 2016 survey of Canadian Paediatric Society (CPS) members found that parents sought advice about their children’s screen time in four main areas: duration (how much is too much?), setting limits, the effects on health and well-being, and optimal content. A literature search  into the effects of screen media on children younger than 5 years old included systematic reviews, guidelines and policy statements on screen media exposure and use. Potential benefits and risks were categorized into developmental, psychosocial and physical domains. Recommendations are based on evidence and expert consensus. Screen time in older children and adolescents, children with neurodevelopmental disorders, and environmental health concerns are beyond the scope of this statement.
Why focus on this age group?
- They may be habit-forming, and early overexposure increases the likelihood of overuse in later life .
- Health routines, including family media use, are established more easily in early childhood than later on .
- Screen use tends to increase over time to include more entertainment (versus exclusively educational viewing) .
Some important trends are reshaping early childhood:
- Active Healthy Kids Canada reported in 2014 that children 3 to 5 years old spend an average of 2 hours per day in front of screens . Only 15% of preschoolers met current Canadian Sedentary Behaviour Guidelines for the Early Years, which recommend limiting screen time to less than 1 hour per day .
- TV still dominates total screen time and appears to be increasing for this age group . Many preschoolers accumulate screen time at home and in child care , from a variety of screens that are easily transportable.
- In the U.S., rates of mobile media use among 2- to 4-year-olds increased from 39% to 80% between 2011 and 2013 -. A recent U.K. study found that about 51% of infants 6- to 11 months old use a touch screen daily .
- A 2012 U.S. study found that the average child between 8 months and 8 years of age is exposed to nearly 4 hours of background TV on a typical day .
Impacts of screen media on development
Whether early exposure to screen media changes the developing brain is not known, and published research on how (and how much) children younger than 5 years of age actually learn from screens remains limited -. Still, studies show that while babies do not absorb content from TV, it can catch and hold their attention. They can imitate specific actions they see on screen between 6 and 14 months, and remember brief sequences by 18 months .
Children begin to understand content by the end of their second year . There is solid evidence that infants and toddlers have difficulty transferring new learning from a 2D representation to a 3D object (e.g., from screen to real life) and are unlikely to learn from TV at this age . By contrast, they learn intensely through face-to-face interaction with parents and caregivers. Early learning is easier, more enriching and developmentally more efficient when experienced live, interactively, in real time and space, and with real people -.
Potential benefits for development
Beginning at about 2 years, quality TV—well-designed, age-appropriate programs with specific educational goals—can provide an additional route to early language and literacy for children . Quality programming also fosters aspects of cognitive development, including positive racial attitudes and imaginative play . Early evidence suggests that interactive media, specifically applications that involve contingent responses from an adult (i.e., timely reactions to what a child says or does), can help children retain taught information. This responsiveness, when coupled with age-appropriate content, timing and intensity of action, can teach new words to 24-month-olds . There is early evidence that interactive ‘learn-to-read’ apps and e-books can build early literacy by providing practice with letters, phonics and word recognition . However, while screens may help with language learning when quality content is co-viewed and discussed with a parent or caregiver , preschoolers learn best (i.e., in expressive and vocabulary terms) from live, direct and dynamic interactions with caring adults .
Risks for development
Research examining TV exposure has demonstrated associations, although not direct causal relationships, between heavy early screen exposure (more than 2 hours/day by infants less than 12 months old in one study) and significant language delays[26,36]. Evidence of an association between screen time and attentional difficulties is mixed, with negative effects only clearly apparent when exposure is extremely high (i.e., more than 7 hours/day) . High exposure to background TV has been found to negatively affect language use and acquisition, attention, cognitive development and executive function in children under 5 years old. It also reduces the amount and quality of parent-child interaction and distracts from play . While e-books have been shown to offer benefits with children’s reading engagement, parents appear to use fewer reading strategies during these interactions. Further, e-book sound effects and animation can interfere with story comprehension and event sequencing in preschoolers, when compared with paper books -.
Some studies associate prolonged TV viewing with lower cognitive abilities, especially related to short-term memory, early reading and math skills, and language development . Fast-paced or violent content can negatively impact executive function[5,46], and these effects may be cumulative. The inability of young children (especially those under 2 years old) to distinguish everyday reality from what happens on screen, along with their efforts to make sense of competing experiential realms, may interfere with and impede executive function .
What makes the difference? Minimizing and mitigating screen time
Because there are no proven benefits of media exposure for infants and toddlers, and some known developmental risks , counsel parents to minimize young children’s screen time. Minimizing screen time leaves more time for face-to-face interactions, which is how young children learn best.
When children watch educational, age-appropriate content with an engaged adult, screen time can be a positive learning experience. When adults mitigate screen time, they:
- Watch with children. Adults can connect what is being viewed with real life, and build language and cognitive skills, such as attention, memory and thinking . Shared screen time also avoids the disadvantages of solitary viewing.
- Actively curate children’s screen activities by prioritizing educational content or apps, avoiding mainstream or commercial programs, and using a media classification rating (e.g., the Canadian Home Video Rating System) to guide viewing choices.
- Combine touch screen use with creative or active play .
Although a ‘digital divide’ between households with and without Internet access persists in Canada, learning apps on mobile devices may help bridge the gap . In 2016, the Canadian Radio-television and Telecommunications Commission pledged to provide Internet access as a basic service for all Canadians . However, even as screen-based educational content becomes increasingly accessible to all families, a new gap may be opening. Children whose parents have the ability to mentor and curate screen encounters may reap benefits that are less accessible in families with fewer financial resources or parents who cannot be as involved. Health providers should be alert to this gap, which may be reflected in other parent-child interactions .
The psychosocial impacts of screen media
Co-viewing quality screen content can affect more than children’s learning. Studies have shown that parents can positively influence children’s social adaptive skills, sleep patterns and behaviours by being involved with and setting limits on their screen time . Television research shows that socio-economic factors can shape the content and mediation of screen use. Further, TV viewing has been found to be negatively associated with school readiness skills, especially as family income decreases . However, the time spent viewing—across diverse middle-income households, for example— is stable . In fact, socio-economic status appears to have little bearing on the degree to which families comply with current screen guidelines . Raising awareness around how children learn best and their need for screen time limits is important for all families, regardless of economic circumstances.
Potential psychosocial benefits
Quality content can enhance social and language skills for all children 2 years and older, particularly for children living in poverty or who are otherwise disadvantaged . Educational TV reaches children in lower-income homes almost as much as higher-income homes, and among children whose families own a laptop or mobile device, barriers to accessing and using educational content have almost disappeared . Well designed, age-appropriate educational programs and screen activities can be powerfully pro-social, helping children to learn antiviolence attitudes, empathy, tolerance and respect . Appropriately used, screen time can calm a child who is overexcited or distressed (e.g., during a medical procedure) . But screen learning can affect behaviour both positively and negatively, so ensuring quality content is crucial .
Developing a family “media action plan” can help protect and reinforce quality family time . Ideally, planning begins prenatally, accounts for the health, education and entertainment needs of each child and family, includes screen-based activities in child care, and is reviewed periodically. Setting meaningful limits when children are young and sharing them as a family is far easier than cutting back screen time when children are older. Studies have found that parents’ comfort level with saying ‘no’ to their children’s requests to play games on screen, along with their own media-related beliefs, intentions and attitudes, are key components of constructive, positive limit-setting . For children—and parents—off-screen time is critical for developing essential life skills such as self-regulation , creativity and learning through physical and imaginative play.
Recent studies confirm a strong association between parents’ screen time and that of their children , raising concerns that increasing media presence is displacing quality (face-to-face) parent-child and family interactions . A recent study of smartphone use in fast-food restaurants observed that as time spent by parents on their phones increased, so too did the likelihood of children acting out to gain attention, often leading to negative interactions . Another study found that parents who allow 1- to 4-year-old children to use their smartphones frequently also report offering the phone to reward or distract more often. Consequently, their children ask for the phone—and become upset if refused—more often .
Parents report that their own use of mobile technology demands more intense attention than other distractions, such as reading books or watching TV. Smartphones blur the line between work and home life, timing is unpredictable, and responding often requires emotional investment. In a recent study, parents reported that shifting attention between screens and family life can be stressful, tiring and reduces their ability to interact ‘in the moment’ with children .
Recent evidence suggests an association between elevated levels of TV exposure at age 2 and self-reported victimization, social isolation, proactive aggression and anti-social behaviours in middle childhood . Excessive TV viewing (more than 2 hours/day) has been clearly associated with early childhood self-regulation difficulties . Such effects could be more pronounced in children with special behavioural needs, and self-perpetuating because parents are more likely to use screen media to pacify a child with challenging behaviours . Research shows that excessive levels of screen media exposure are associated more strongly with low levels of stimulation in the home and low parental involvement than with socio-economic position .
A large-scale U.S. study from 2013 found that the spread of mobile devices did not appear to affect the amount or frequency of reading to young children. However, it also found that reading was the least-common activity children engaged in on tablets or mobile devices . Other studies suggest that parents found reading to their child from an e-book to be a less positive experience than sharing a paper book, from both fun and learning perspectives [66,67]. Even the most interactive e-books do not support skills like page-turning, and cannot provide the same sensory experiences as traditional books, which can be affectionately dragged around, manipulated and chewed.
While quality educational programming is a leading mitigator of psychosocial risk on any screen, studies show that children’s access to and choice of optimal content peaks early: at 2 to 4 years old . As children age, they are more likely to view entertainment programming.
What makes the difference? Mindful use of screen time
Children younger than 5 years old learn best from live, immersive interactions with family members and caregivers. Given the choice, they will nearly always opt for talking, playing or being read to over screen time in any form . By using screen time mindfully, parents and caregivers:
- Actively enhance—and limit—media encounters by choosing them together and purposefully (“Let’s watch or play this content, at this time, for this reason”).
- Limit screen use in public places and during family routines, such as at meals. Family times are prime opportunities for social learning.
- Select content from quality, non-commercial sources, to minimize exposure to advertising.
- Pay attention to messages about gender, body image, violence, diversity and social issues when choosing content.(69)
The impacts of screen media on physical health
For preschool children, physical activity is associated with improved measures of health, while sedentary behaviour is associated with less favourable health outcomes .
Potential benefits for physical health
Children’s screen time does not have to be passive; digital media use can encourage and complement physical activity . Especially after age 3, children respond to activity-based programming when it is fun, designed for them and encourages imitation or participation . One study found that active video games could acutely increase light-to-moderate or moderate-to-vigorous physical activity (PA) in the short term . Families and child care programs may consider using fun, age-appropriate movement (e.g., yoga or dance) and fitness apps or console games to integrate more PA into daily routines . Mobile devices with apps for exploring the natural world can enhance outdoor PA . Quality content connects on- with off-screen experiences, fosters engagement with caregivers and peers, and supports active, imaginative play . One 2010 study found that while time spent watching commercial TV was significantly correlated with BMI, time spent watching non-commercial educational TV was not .
Risks for physical health
Although evidence for an association between screen time and body mass index in very young children is inconclusive, several studies have suggested that risks for overweight established by early screen use can persist into later life -. TV viewing in the early years can become routine, placing children who are heavy viewers at higher risk for being sedentary or overweight . One 2012 Canadian study found that children who watched just 1 hour of TV/day were 50% more likely to be overweight than those who watched less . Another study from 2009 measuring PA and body fat in middle-class preschoolers linked TV viewing to higher body fat, and found this relationship did not change when children’s variable PA rates were taken into account .
While reinforcing sedentary behaviours, commercial TV also exposes children to advertisements for unhealthy foods and encourages snacking, which increases overall food intake . A 2012 systematic review of TV watching and adverse dietary effects in children 2 to 6 years old found most studies reported negative effects with as little as one hour/day of viewing .
The amount of time spent viewing screens before bedtime is associated with an increase in sleep problems for this age group [6,85], and evidence suggests that volume of screen time—rather than content alone—is detrimental to sleep patterns . The presence of any electronic device in a bedroom is associated with fewer minutes of sleep per night, due in part to melatonin suppression .
What makes the difference? Modelling screen time
Children younger than 5 years old require active play and quality family time to develop essential life skills, such as language, self-regulation and creative thinking. Regardless of age, children should not have to compete with screens for parental attention. When parents model healthy screen habits, they:
- Minimize their own screen use when young children are present, especially for mealtimes, play and other prime opportunities for social learning.
- Prioritize interactions with children through conversation, play and healthy, active routines.
- Choose when to use media together, and turn off screens when they are not in use.
- Help children to recognize and question advertising messages, stereotyping and other problematic content, and ensure that media used in the presence of children is free of such content.
To promote child health and development in a digital world, physicians and other health care providers should counsel parents and caregivers of young children on the appropriate use of screen time. Specific recommendations include the following:
Minimize screen time:
- Screen time for children under 2 years old is not recommended.
- For children 2 to 5 years, limit routine or regular screen time to under 1 hour per day.
- Ensure that sedentary screen time is not a routine part of child care for children younger than 5 years old.
- Maintain daily ‘screen-free’ times, especially for family meals and book-sharing.
- Avoid screens for at least one hour before bedtime, given the potential for melatonin-suppressing effects.
Mitigate (reduce) the risks associated with screen time:
- Be present and engaged when screens are used and, whenever possible, co-view with children.
- Be aware of content and prioritize educational, age-appropriate and interactive programming.
- Use parenting strategies that teach self-regulation, calming and limit-setting.
As a family, be mindful about the use of screen time:
- Conduct a self-assessment of current screen habits and develop a family media plan for when, how and where screens may (and may not) be used.
- Help children recognize and question advertising messages, stereotyping and other problematic content.
- Remember: Too much screen time means lost opportunities for teaching and learning.
- Be reassured that there is no evidence to support introducing technology at an early age.
Adults should model healthy screen use:
- Choose healthy alternatives, such as reading, outdoor play and creative, hands-on activities.
- Turn off their devices at home during family time.
- Turn off screens when not in use and avoid background TV.
10 questions to consider asking families with young children
Information for parents is available at www.caringforkids.cps.ca
The development of this statement was made possible through an unrestricted grant from TELUS. This statement was reviewed by the Community Paediatrics Committee, the Early Years Task Force and the Mental Health and Developmental Disabilities Committee of the Canadian Paediatric Society. It was also reviewed by representatives of the College of Family Physicians of Canada. Special thanks are due to Professor Mary L Courage, of Memorial University of Newfoundland and Labrador, to Dr. Claire MA LeBlanc, with McGill University Health Centre, and to Dr. Mark Tremblay, of the Healthy Active Living and Obesity Research Group (HALO), for their reviews and feedback. Thanks also to Jennie Strickland, for statement drafting, and to Jessie McGowan, for reviewing the literature.
CPS DIGITAL HEALTH TASK FORCE
Chair: Michelle Ponti MD. Members: Stacey Bélanger MD (CPS Mental Health and Developmental Disabilities Committee); Ruth Grimes MD (CPS Board Representative); Janice Heard MD (CPS Public Education Advisory Committee); Matthew Johnson (Director of Education, MediaSmarts); Elizabeth Moreau (Director, CPS Communications and Knowledge Translation); Mark Norris MD (CPS Adolescent Health Committee);; Alyson Shaw MD (Chair, CPS Literacy Promotion Advisory Group); Richard Stanwick MD (CPS Public Education Advisory Committee); Jackie Van Lankveld (Manager, Speech Services, Niagara Children’s Centre); Robin Williams MD (Chair, CPS Early Years Task Force).
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Disclaimer: The recommendations in this position statement do not indicate an exclusive course of treatment or procedure to be followed. Variations, taking into account individual circumstances, may be appropriate. Internet addresses are current at time of publication.