multitasking;

“The mental habit of dividing one’s attention into many small slices has significant implications for the way young people learn, reason, socialize, do creative work and understand the world.”

“Decades of research (not to mention common sense) indicate that the quality of one’s output and depth of thought deteriorate as one attends to ever more tasks.”

“...there’s substantial literature on how the brain handles multitasking. And basically, it doesn’t.”

Three quotes from a Time Magazine article from 2006, that quotes from research and researchers, describing multitasking as sequential processing, where the brain moves from one activity to another. “When people try to perform two or more related tasks either at the same time or alternating rapidly between them, errors go way up, and
it takes far longer–often double the time or more–to get the jobs done than if they were done sequentially.”