Dr. Gloria Mark, a professor of informatics at the University of California, Irvine, studies how digital media impacts our lives. In her new book, she explains how decades of research has tracked the decline of the ability to focus.

“In 2004, we measured the average attention on a screen to be 2½ minutes,” Mark said. “Some years later, we found attention spans to be about 75 seconds. Now we find people can only pay attention to one screen for an average of 47 seconds.” [source]

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