Associations between screen time and cognitive development in preschoolers

Area of Science:

• Child Development
• Cognitive Science
• Public Health

Background:

• Screen time is prevalent among preschoolers.
• Understanding its impact on early cognitive development is crucial for public health guidelines.
• Previous research has yielded mixed results on screen time and cognitive outcomes.

Purpose of the Study:

• To investigate the association between screen time and cognitive development in preschoolers.
• To determine if adherence to recommended screen time limits impacts cognitive skills.
• To differentiate the effects of television viewing versus video gaming on cognitive function.

Main Methods:

• Cross-sectional study of 97 preschoolers (36-60 months).
• Screen time assessed via parental questionnaire (television time, video game time, total screen time).
• Cognitive development measured using expressive vocabulary and working memory assessments (Early Years Toolbox).

Main Results:

• Higher total screen time was associated with lower working memory capacity (OR=0.52).
• No significant association was found between screen time and expressive vocabulary.
• Preschoolers meeting the recommended screen time limit (≤1 hour/day) showed higher working memory capacity (OR=3.48).

Conclusions:

• Limiting total screen time to one hour per day may support working memory development in preschoolers.
• Screen time appears unrelated to expressive language development in this age group.
• Adherence to screen time recommendations is positively associated with working memory.