Does phone use in bed hurt sleep?

Many people expect phones in bed to cost them sleep. I tested it with a week of daily surveys from college students.

My role: First author, with Kushlev
Status: Presented at SPSP 2021 as a poster

Main findings

Screen time in bed went with better sleep outcomes

91 college students answered short surveys for seven days, which gave 536 bedtime episodes. The poster reports correlations within each person and between people.

Screen time in bed predicted better sleep outcomes.

536

bedtime episodes from 91 students

Seven days of daily surveys.

What this means

Screen time in bed did not predict worse sleep here. It predicted better sleep outcomes in this sample.

Limits. This is a poster with a small student sample and self-reported measures. It has not been published.