Overestimating Our Overworking

Think you're working a lot? Think again:

Sociologists have been studying how Americans spend their time for decades. One camp favors a simple approach: if you want to know how many hours someone works, sleeps or vacuums, you ask him. Another camp sees a flaw in this method: People lie. We may not do so maliciously, but it's tough to remember our exact workweek or average time spent dishwashing, and in the absence of concrete memories, we're prone to lie in ways that don't disappear into the randomness of thousands of answers. They actually skew results.

That's the theory behind the American Time Use Survey, conducted annually by the Bureau of Labor Statistics. The ATUS, like a handful of previous academic surveys, is a "time diary" study. For these studies, researchers either walk respondents through the previous day, asking them what they did next and reminding them of the realities of time and physics, or in some cases giving them a diary to record the next day or week.

Time-diary studies are laborious, but in general they are more accurate. Aggregated, they paint a different picture of life than the quick-response surveys featured in the bulk of America's press releases. For instance, the National Sleep Foundation claims that Americans sleep 6.7 hours (weekdays) to 7.1 hours (weekends) per night. The ATUS puts the average at 8.6 hours. The first number suggests rampant sleep deprivation. The latter? Happy campers.