How Awake Are You?


Whether you're behind the wheel of a car, operating a power tool, or changing a light bulb, drowsiness can sneak up when you least expect it, causing lapses of attention and putting you at risk of hazardous errors.

Did you know that poor sleep can affect your performance as much as alcohol? That's right. Being awake for 22 hours straight can slow your reaction time more than four drinks can. And just like alcohol, sleepiness impairs judgment, so you don't necessarily know you're impaired when you are.

This interactive is an online adaptation of performance tests commonly used in research labs to examine the effects of sleep deprivation. Although great emphasis has been placed on scientific accuracy, please know that results may vary as a result of connection speed, processor load, and type of web browser, as well as a user's age, intake of caffeine or alcohol, and many other variables that cannot be controlled in an online environment.