Tag: university of california

Using smartphones to measure how much time people spend looking at those phones confirms that more screen time is tied to poorer sleep, researchers say.

"This is the first study to directly measure actual screen time in natural environments and compare it to sleep quality," said senior author Dr. Gregory M. Marcus of the University of California, San Francisco. "We did not rely on participant self-report, but rather utilized a mobile app that ran in the background and could capture exact screen time duration."