Sleep Sound and Feel Good
Wylie Stiver
Island Pacific School
Floor Location : J 194 H

Blue light from devices and lights affect us all constantly. Approximately 60% of people spend more than six hours a day in front of a device. I wanted to see how this widely known technology affects us and how we are being changed because of it. Whether it is a job; an assignment at school, or simple enjoyment, I wanted to find the ways that we are growing or being harmed by this light. People spent many years without blue light-emitting devices and, although they help us immensely, I was curious about whether that knowledge and help came with a price. My goal was to gain a better understanding of the effects of blue light on some of the most important human processes and functions.

The purpose of this experiment is to determine if blue light has a negative or positive effect on teenagers' mood and sleep.

My hypothesis is that the subjects not exposed to blue light before bed will feel better and have a longer sleep than the subjects exposed to blue light.

My project involved fellow grade seven students to see how blue light exposure from devices effected their sleep. I got them to spend an hour on screens before bed on one night and no screens for an hour before bed on the second night. I tracked their sleep on a fitbit watch and they filled out google forms for tracking their mood.

The end results of the sleep section of my project matched my hypothesis. Every subject got more sleep on night two, when they were not exposed to blue light, and less sleep on night one, the night they were on their screens. Specifically, they got 0.7725 hours more sleep on Night two. Therefore, my results show that people who have and hour of screens before bed sleep worse than those who do not have screens at all. As for the mood section, there was no clear answer. Two people matched my hypothesis (felt better on the second night) whereas one felt the same throughout and one felt worse on the second day. This part of my experiment was somewhat inconclusive.