"Workers on average spend just eleven minutes on a project before switching to another, and while focusing on a project, typically change tasks every three minutes....Once distracted, we take about twenty-five minutes to return to an interrupted task and usually plunge into two other work projects in the interim....Nearly 45 percent of workplace interruptions are self-initiated. (And when workers interrupt themselves, they take slightly longer to resume their original work--about twenty-eight minutes on average."
Maggie Jackson, Distracted, Amherst, NY: Prometheus Books. pp 84-86.
Jackson is referring to Gloria Mark, Victor Gonzalez, and Justin Harris, "No Task Left Behind? Examining the Nature of Fragmented Work," Proceedings of the Conference on Human Factors in Computer Systems (Portland, OR, 2005).
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