UNAM Study Warns Parents: How Infinite Scrolling Affects Teen Brains and Attention

A study by the National Autonomous University of Mexico (UNAM) highlights the detrimental effects of continuous scrolling on the brains and attention spans of adolescents. The constant interaction with short-form videos subjects young minds to a state of stimulation that fragments deep attention periods, directly impacting cognitive abilities and academic performance.

The adolescent stage is characterized by heightened sensitivity to reward systems and social validation. According to UNAM's Gaceta, gratifying stimuli and social media approval metrics are highly appealing during this developmental phase, making it harder for teenagers to resist the urge to check their devices.

“

The adolescent stage is characterized by a biological maturation where the systems linked to reward and social sensitivity are highly reactive.

This hyper-fragmented consumption leads to "cognitive fatigue," a progressive exhaustion of neurological systems responsible for sustained attention, memory formation, and emotional regulation. Research by psychologist Gloria Mark indicates a historical decline in attention spans, from an average of 150 seconds per website in 2003 to just 47 seconds today.

“

This state does not constitute simple ordinary mental fatigue, but rather represents a progressive exhaustion of the neurological systems responsible for sustaining attention, fixing memories, and regulating emotional responses.

The digital environment's impact extends beyond classroom distraction, contributing to lower grades, emotional distress, and weaker social bonds. The analysis links platform overuse to increased anxiety, stress, and self-esteem issues due to constant social comparison. Short-form content can amplify existing vulnerabilities like fragile moods or reactive attention styles.

UNAM suggests practical environmental control strategies for parents and educators, such as setting clear intentions before using devices and limiting session times. Maintaining physical distance from devices and establishing specific times for digital interaction are also recommended.

“

While in 2003 a person averaged 150 seconds of attention on a website before changing activity, the contemporary average has dropped to a mere 47 seconds.