Business for Sale Marketplace - A Single Platform for Entrepreneurs & Dealmakers Login | About us | FAQ

Sorry, Bedtime Readers: iPads Keep You Awake Even With Night Shift On

There’s an expression about knowing just enough to be dangerous. In the case of sleep science, Apple may know just enough to disappoint. In 2016, it introduced an iOS feature (later added to MacOS) called Night Shift that can change the screen to a “warmer” (orangey) hue before bedtime. The aim is to reduce the blue light that blocks production of the sleep-inducing hormone melatonin. But a new study by the Rensselaer Polytechnic Institute in New York State shows that Night Shift’s effect on melatonin is negligible, although the color change could have a psychological effect. And other factors, like screen brightness and a preoccupation with what’s on the screen, can also keep people awake. First some background: researchers established in a 2013 study that looking at a tablet screen at night would push down melatonin. They tested subjects using an iPad 2 and found that melatonin production dropped 23% after two hours of looking at the screen. [Screenshot: Sean Captain] Mariana Figueiro, director of Rensselaer’s Lighting Research Center, worked on the original study and directed the latest, which tested the effect of Night Shift at the two extremes of its color adjustment slider. In the “Less Warm” setting, which is close to the standard screen hue, melatonin fell by 19% after two hours of using an iPad in the evening. In the “More Warm” setting, which is about the color of light from an incandescent bulb, melatonin dropped 12% . At first, it may look like Night Shift is helping, but these differences fall within the margin of error. “Basically having the night shift at any mode is not statistically significantly different than not using it,” says Figueiro. Related: Apple Is Making Color Quality The New Killer Feature Even if it’s reducing melatonin suppression, Night Shift isn’t stopping it completely, and the amount it helps is unclear. “Right now no one knows if 1%, 10%, 20% melatonin suppression is [significant],” says Figueiro. “There is a camp in science that says you have to have zero suppression.” The amount of time makes a difference. After just one hour of iPad use, melatonin was suppressed only 15% in less warm and only 8% under more warm

Read the original post:
Sorry, Bedtime Readers: iPads Keep You Awake Even With Night Shift On

Tagged as: , , , , ,

Comments are closed.