Does screen time harm toddlers' development?

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1. 1

   Associations Between Screen Use and Child Language Skills

   Archives of Pediatrics and Adolescent Medicine (Madigan et al.)Published Mar 23, 2020Checked Sep 30, 2026

   “Participants totaled 18 905 from 42 studies included. Effect sizes were measured as correlations (r). Greater quantity of screen use (hours per use) was associated with lower language skills (screen time [n = 38; r = -0.14; 95% CI, -0.18 to -0.10]; background television [n = 5; r = -0.19; 95% CI, -0.33 to -0.05]), while better-quality screen use (educational programs [n = 13; r = 0.13; 95% CI, 0.02-0.24]; co-viewing [n = 12; r = 0.16; 95% CI, 0.07-.24]) were associated with stronger child language skills. Later age at screen use onset was also associated with stronger child language skills [n = 4; r = 0.17; 95% CI, 0.07-0.27]. Conclusions and Relevance: The findings of this meta-analysis support pediatric recommendations to limit children's duration of screen exposure, to select high-quality programming, and to co-view when possible.”

2. 2

   Associations of screen time, sedentary time and physical activity with sleep in under 5s: A systematic review and meta-analysis

   Sleep Medicine Reviews (Janssen et al.)Published Nov 3, 2019Checked Sep 30, 2026

   “Evidence was selected according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines and synthesized using vote counting based on the direction of association. Quality assessment and a Grading of Recommendations, Assessment, Development and Evaluation was performed, stratified according to child age, exposure and outcome measure. Thirty-one papers were included. Results indicate that screen time is associated with poorer sleep outcomes in infants, toddlers and preschoolers. Meta-analysis confirmed these unfavorable associations in infants and toddlers but not preschoolers. For movement behaviors results were mixed, though physical activity and outdoor play in particular were favorably associated with most sleep outcomes in toddlers and preschoolers. Overall, quality of evidence was very low, with strongest evidence for daily/evening screen time use in toddlers and preschoolers. Although high-quality experimental evidence is required, our findings should prompt parents, clinicians and educators to encourage sleep-promoting behaviors (e.g., less evening screen time) in the under 5s.”

3. 3

   The Relationships between Screen Use and Health Indicators among Infants, Toddlers, and Preschoolers: A Meta-Analysis and Systematic Review

   International Journal of Environmental Research and Public Health (Li et al.)Published Oct 7, 2020Checked Sep 30, 2026

   “A systematic search was conducted by two independent reviewers on PubMed, Web of Science, Embase, and Cochrane Library to identify the eligible studies, with an end date of 13 August 2019. Included studies (published in English) were peer-reviewed and met the determinate population (children aged 0-7 years with screen media exposure and related health outcomes). The AHRQ, NOS, and the Cochrane Handbook were used to evaluate the cross-sectional study, cohort study, and RCT, respectively. A meta-analysis and narrative syntheses were employed separately. Eighty studies (23 studies for meta-analysis) met the inclusion criteria for the systematic review. Strong evidence of the meta-analysis suggested that excessive screen time was associated with overweight/obesity and shorter sleep duration among toddlers and preschoolers. Excessive screen use was associated with various health indicators in physical, behavioral, and psychosocial aspects. Better-quality research on newer media devices, on various kinds of contents in young children, and on dose-response relationships between excessive screen use and health indicators are needed to update recommendations of screen use.”

4. 4

   The impact of screen-based media exposure on infant and toddler development: A systematic review of psychological and behavioral domains.

   Acta psychologica (Yiyun)Published Apr 17, 2026Checked Oct 4, 2026

   “This systematic scoping review synthesizes findings from 158 peer-reviewed studies published between May 2007, which coincided with the emergence of the smartphone era, and July 2024. Drawing on 10 academic databases, the review evaluates how screen-based media exposure affects nine key developmental domains in children aged 0-36 months: sleep physiology, biological health indicators, cognitive processing, language acquisition, psychomotor skills, emotional regulation, social reciprocity, adaptive functioning, and overall developmental trajectories. The analysis reveals both potential risks and mixed findings across domains, and identifies significant methodological shortcomings in the existing literature. These include a lack of causal research designs, insufficient contextual detail regarding screen content and co-viewing environments, and inconsistent use of developmentally sensitive assessment tools. This review underscores the urgent need for more nuanced, longitudinal, and ecologically valid research to inform evidence-based guidelines for screen use in early childhood.”

5. 5

   Associations Between Early Screen Exposure and Neurocognitive Outcomes in Children Aged 2-5 Years: A Systematic Review.

   Healthcare (Basel, Switzerland) (Panayotova & Yakabova)Published Sep 19, 2026Checked Oct 4, 2026

   “Greater screen exposure was generally associated with less favourable language outcomes, particularly expressive language, vocabulary, communication, and developmental measures. Attention regulation, self-regulation, and selected executive-function outcomes also showed adverse associations; findings for inhibitory control, working memory, cognitive flexibility, and general cognitive performance were more heterogeneous. Passive viewing, background media, solitary use, and highly stimulating entertainment-oriented content were more often associated with less favourable outcomes. Caregiver co-viewing, joint media engagement, and developmentally appropriate content were associated with weaker adverse or neutral findings. Screen exposure in children aged 2-5 years is associated with neurocognitive outcomes in a context-dependent manner. Duration alone is insufficient; content, background exposure, caregiver involvement, family routines, and the home learning environment should also be considered. Findings support cautious, family-centred guidance and stronger longitudinal and intervention studies with more precise exposure measurement.”

6. 6

   Daily touchscreen use in infants and toddlers is associated with reduced sleep and delayed sleep onset

   Scientific Reports (Cheung et al.)Published Apr 13, 2017Checked Sep 30, 2026

   “However, this association has not been demonstrated empirically. This study aims to examine whether frequency of touchscreen use is associated with sleep in infants and toddlers between 6 and 36 months of age. An online survey was administered to 715 parents reporting on child media use (daily exposure to TV and use of touchscreens), sleep patterns (night-time and daytime sleep duration, sleep onset - time to fall asleep, and frequencies of night awakenings). Structural equation models controlling for age, sex, TV exposure and maternal education indicated a significant association between touchscreen use and night-time sleep, daytime sleep and sleep onset. No significant effect was observed for the number of night awakenings. To our knowledge, this is the first report linking the use of touchscreen with sleep problems in infants and toddlers. Future longitudinal studies are needed to clarify the direction of effects and the mechanisms underlying these associations using detailed sleep tracking.”

7. 7

   Effects of screentime on the health and well-being of children and adolescents: a systematic review of reviews

   BMJ Open (Stiglic & Viner)Published Jan 1, 2019Checked Sep 30, 2026

   “13 reviews were identified (1 high quality, 9 medium and 3 low quality). 6 addressed body composition; 3 diet/energy intake; 7 mental health; 4 cardiovascular risk; 4 for fitness; 3 for sleep; 1 pain; 1 asthma. We found moderately strong evidence for associations between screentime and greater obesity/adiposity and higher depressive symptoms; moderate evidence for an association between screentime and higher energy intake, less healthy diet quality and poorer quality of life. There was weak evidence for associations of screentime with behaviour problems, anxiety, hyperactivity and inattention, poorer self-esteem, poorer well-being and poorer psychosocial health, metabolic syndrome, poorer cardiorespiratory fitness, poorer cognitive development and lower educational attainments and poor sleep outcomes. There is evidence that higher levels of screentime is associated with a variety of health harms for CYP, with evidence strongest for adiposity, unhealthy diet, depressive symptoms and quality of life. Evidence to guide policy on safe CYP screentime exposure is limited. PROSPERO REGISTRATION NUMBER: CRD42018089483.”

8. 8

   Types of Screen Time and Developmental Outcomes Among Children Aged 0-6 Years in Thailand: A Cross-Sectional Study.

   Child: care, health and development (Jaichomcheun et al.)Published Sep 1, 2026Checked Oct 4, 2026

   “Each additional hour of total screen time was associated with increased odds of suspected developmental delays across developmental domains, particularly receptive language delay (aOR 1.52, 95% CI 1.30-1.79) and gross motor delay (aOR 1.49, 95% CI 1.21-1.84). Recreational screen time showed the strongest associations, particularly for receptive language delay (aOR 2.39, 95% CI 1.73-3.30) and personal-social delay (aOR 2.27, 95% CI 1.68-3.08). In contrast, educational screen time was associated with lower odds of receptive language delay (aOR 0.45, 95% CI 0.23-0.88) and expressive language delay (aOR 0.40, 95% CI 0.16-0.99), whereas communication-based screen time was associated with lower odds of personal-social delay (aOR 0.14, 95% CI 0.02-0.95).ConclusionsHigher total and recreational screen time were associated with increased odds of suspected developmental delays, whereas educational and communication-based screen time were associated with lower odds in specific domains. Limiting recreational screen time and promoting age-appropriate, high-quality, interactive screen use may support child development.”

9. 9

   Young children's screen time, executive functions, and language development: Longitudinal moderation of parent/child coviewing and media content.

   Developmental psychology (Porter et al.)Published Jun 22, 2026Checked Oct 4, 2026

   “Primary caregivers reported children's screen time at age 2 (M = 28.13 months, SD = 6.84), and children's EF and language were assessed at age 4 (M = 4.07 years, SD = 4.0 months) using standardized assessments (e.g., National Institutes of Health Toolbox Cognition Battery) and Kochanska's effortful control/EF tasks (i.e., Snack Delay, Whisper, Day/Night). Higher screen time at age 2 was associated with poorer performance on both hot and cold EF tasks and lower receptive vocabulary at age 4. Parent-child coviewing predicted better working memory, and higher exposure to educational content was linked to stronger EF and language outcomes. However, neither coviewing nor educational content moderated the effects of screen time on developmental outcomes over time. In contrast, higher exposure to violent content moderated children's attentional shifting performance. Overall, these findings suggest that early screen exposure-particularly to violent content-may negatively impact children's cognitive/regulatory development. (PsycInfo Database Record (c) 2026 APA, all rights reserved).”

10. 10

    Screen time (Wikipedia)

    WikipediaPublished Sep 29, 2026Checked Sep 30, 2026

    “Screen time is the amount of hours spent using an electronic device with a display screen emitting blue light, such as a smartphone, computer, television, video game console, or tablet. The concept is under significant research with related concepts in digital media use and mental health. Screen time is correlated with mental and physical harm in child development. The positive or negative health effects of screen time on a particular individual are influenced by levels and content of exposure. Screen time is known to increase dopamine and mess with the circadian rhythm. To prevent harmful excesses of screen time, some governments have placed regulations on usage.”