An interruption of thirty seconds does not cost thirty seconds. Returning to a task means rebui the arran of infor that w being he in mi, and rebui it ta far lon than hol it did. Measured in the office, the recovery runs to several minutes, and it is longer when the interrupted work was unfamiliar. The finding explains a familiar complaint, that a day broken into short pieces produces almost nothing while the same hours undisturbed produce a great deal.

Type only the missing letters. Each box is one letter, and the number of boxes matches the letters that are missing.