Doug Ross, 31, wakes every morning to a screen full of notifications.
He receives updates from news apps, chats from co-workers and e-mails from clients, all beckoning to be answered before the workday even starts. As a consultant for the software company Adobe, he has alerts pouring in the rest of the day. He usually answers within seconds, rarely letting his phone get out of reach.
"I never have it away from my person," he said of his phone. "That gives me anxiety. It bothers me, because I know what is going to be on the phone when I get back to it, or what I'm going to miss."
Many people find the constant dings, rings, buzzes and beeps that come from their computers and cellphones impossible to ignore. Experts say it's a sign of our dependency on technology, which validates and entertains us while also cutting into our productivity and altering our attention span for the worse.
When a cellphone, laptop computer or smartwatch makes a noise, it produces mental and physical reactions in people, said Larry Rosen, a psychology professor emeritus at California State University, Dominguez Hills, and author of "The Distracted Mind: Ancient Brains in a High-Tech World." Their heart rates increase. Their skin tingles. They grow increasingly antsy with every minute they don't look at the screen.
"We've trained ourselves, almost like Pavlov's dogs, to figuratively salivate over what that vibration might mean," Rosen said. "If you don't address the vibrating phone or the beeping text, the signals in your brain that cause anxiety are going to continue to dominate, and you're going to continue feeling uncomfortable until you take care of them."
The reaction is so ingrained that it kicks in even without a prompt, Rosen said. The average person checks their cellphone about 60 times per day, or nearly four times each waking hour, whether they hear a sound or not, according to one of his recent studies.
"Almost exactly half of the check-ins have no alerts or notifications," he said. "It's your brain telling you to check in. It's your brain telling you 'I don't know if anyone new is following me.' "