Preschoolers' extensive use of electronic media, including game consoles, mobile phones, and tablets, is linked to a heightened risk of emotional and behavioural problems by the age of 5, finds new research.
According to the study was published in the online journal BMJ Open, this behaviour is associated with hyperactivity, short attention span, poor concentration and peer relationship issues, among other things.
Patterns of children's electronic media use are changing rapidly, say the researchers.
Preschoolers' use of mobile phones and tablets tripled between 2013 and 2017, with recent studies indicating that many 4-year-olds now play games, use apps, or watch videos on them every day.
Concerns have been raised that young children's extensive use of electronic media may impede healthy development, affecting language and social skills, as well as potentially fostering addictive behaviour.
The researchers, therefore, wanted to find out if extensive electronic media use among young children might affect their psychological health and wellbeing by the time they reach the age of 5, and if different types of activity might be influential.
They drew on participants in the Finnish CHILD-SLEEP longitudinal birth cohort study, which has regularly tracked children's health and/or psychological wellbeing from before birth (32 weeks) up to the age of 5, via parental questionnaires.
The final analysis included 699 children (333 girls; 366 boys) for whom complete health and questionnaire data were available from the age of 18 months onwards.
Around two-thirds of the children (68 per cent) were in full-time daycare; nearly two-thirds of the parents (64 per cent) were educated to degree level.
Parents reported how much time their child spent using electronic media at 18 months and 5 years of age, both during the week and at the weekend.
Preschoolers' use of mobile phones and tablets tripled between 2013 and 2017, with recent studies indicating that many 4-year-olds now play games, use apps, or watch videos on them every dayParents were specifically asked how many hours their child watched programmes on television or other devices, and (at 5 years) how many hours their child played games on a computer, games console, mobile phone, tablet or another device.
The responses were used to calculate a daily average for programme watching, game playing, and total screen time.
At 18 months of age, the toddlers spent an average of 32 mins/day on electronic media devices. By the age of 5 this had increased to114 mins/day.
And nearly 1 in 4 children (23 per cent) spent more than an hour on total screen time every day at 18 months of age; by the age of 5, this percentage had risen to 95 per cent.
By the age of 5, more than two thirds (67 per cent) watched programmes for more than an hour a day and around 1 in 10 (11 per cent) spent more than an hour a day gaming.
The Maximum recommended daily use of electronic media for preschoolers is 60 minutes.
When the children were 5, validated questionnaires (FTF and SDQ) were used to assess the prevalence of 'psychosocial symptoms' -- emotional and behavioural issues, short attention span, hyperactivity, and difficulties making and keeping friends.
Extended use of all electronic media at 18 months was associated with a 59% heightened risk of peer relationship problems by the age of 5, but nothing else.
By the age of 5, extensive electronic gaming was associated only with a heightened risk of hyperactivity, which disappeared after taking account of influential factors. But lengthy programme viewing was associated with a heightened risk of several psychosocial problems.
And excess total screen time at 5 years of age was associated with a heightened risk of attention and concentration difficulties, hyperactivity and impulsivity, hyperactivity and impulsivity and emotional and behavioural problems.