I think most people probably agree that the smartphone is the most useful productivity tool ever created, while also being the single most distracting piece of technology in our lives. It helps us stay connected to people and to our jobs, but it also serves as a constant source of incoming messages, access to information and notifications. 

In fact, researchers have found "adults' excessive cell phone usage was associated with depressive mood, anxiety and loneliness... Users spending excessive time on a cell phone had higher stress levels." In addition, the study noted that "problematic cell phone usage is associated with psychological distress and emotional dys-regulation."

In another study, neuroscientists found that smartphone use can affect changes in areas of our brain that help us focus.

Please select this link to read the complete article from Inc.