Passive vs Active Nighttime Smartphone Use as Markers of Next-Day Suicide Risk

Area of Science:

• Digital mental health
• Suicidology
• Behavioral science

Background:

• Nighttime is a critical period for suicidal thoughts.
• Understanding the impact of digital technology use during these hours on suicide risk is limited.
• Distinguishing between passive and active digital engagement may aid suicide intervention development.

Purpose of the Study:

• To investigate the association between the timing and type (passive vs. active) of nighttime smartphone use and next-day suicidal ideation and planning.
• To examine these associations in adults at high risk for suicide.

Main Methods:

• A 28-day survey and passive data sensing study using ecological momentary assessment (EMA) and smartphone screenshots.
• Participants (n=79) with past-month suicidal thoughts or behaviors provided data.
• Bayesian multilevel models analyzed associations between nighttime phone use patterns and next-day suicidal ideation/planning.

Main Results:

• Late-night phone use (11 PM–1 AM) was associated with increased next-day suicidal ideation and planning.
• Longer phone-free intervals (7–9 hours) correlated with lower suicidal ideation.
• Active smartphone engagement (keyboard use) during middle-night hours (1 AM–5 AM) was linked to reduced suicidal ideation.

Conclusions:

• Temporally specific associations exist between nighttime smartphone use and next-day suicide risk.
• Late-night use indicates vulnerability, while middle-night active engagement may be protective.
• Findings differentiate harmful passive digital consumption from potentially adaptive coping mechanisms for suicide prevention.