Do Children's Brains Function Differently During Book Reading and Screen Time? A fNIRS Study

Area of Science:

• Neuroscience
• Developmental Psychology
• Pediatric Language Development

Background:

• Previous research indicates differing effects of book reading and screen time on child development.
• Limited studies have directly compared brain function during these activities in young children.

Purpose of the Study:

• To investigate neurobiological differences in preschool-aged children's brain activity during book reading versus screen time.
• To explore how brain lateralization patterns vary between these two common childhood activities.

Main Methods:

• Utilized functional near-infrared spectroscopy (fNIRS) to measure brain responses in 28 typically developing children (36-72 months).
• Compared brain activation during a live book reading condition with a screen time condition involving digital media.
• Analyzed activity in key regions of interest: inferior/middle frontal gyrus (IMFG), superior/middle temporal gyrus (SMTG), and temporal parietal junction (TPJ).

Main Results:

• Significant activation was observed in the right temporal parietal junction (TPJ) exclusively during the book reading condition.
• Book reading showed greater right-lateralized brain response in ROIs compared to left-lateralized response.
• Screen time condition exhibited similar brain responses across left and right ROIs.

Conclusions:

• Preschoolers' brain function lateralization differs significantly between book reading and screen time.
• These neurobiological distinctions may explain divergent impacts on language development.
• Findings highlight differences in brain activity related to dyadic versus solitary activities and print versus digital media consumption.