Most of what goes wrong, or at least does not go well, is likely to be merely a temporary malfunctioning of one sort or another


The placebo effect is known far and wide. Give somebody a sugar pill, tell them it’s aspirin, and they’ll feel better. What’s less well-known is that there’s evidence of the placebo effect in domains that go beyond the commonly known medical scenarios.

One study found that hotel maids who were told their work was good exercise later scored higher than a control group on a range of health indicators. Another study found that when participants were told athletes had excellent vision, they demonstrated better vision when doing a more-athletic activity relative to a less-athletic activity. Many studies have also shown that placebo caffeine can have an impact. In one experiment caffeine placebos improved cognitive performance among participants who were in the midst of 28 hours of sleep deprivation.

Given that caffeine placebos can mitigate the effects of sleep deprivation, Christina Draganich and Kristi Erdal of Colorado College decided to take the logical next step and investigate whether the effects of sleep deprivation could be influenced by perceptions about sleep quality. In other words, could making people think their sleep quality was better or worse influence the cognitive effects of sleep?

{ Peer-reviewed by my neurons | Continue reading }

images { 1. David Cutter | 2 }