Journal Article

The effects of a mid-day nap on the neurocognitive performance of first-year medical residents: a controlled interventional pilot study.

Amin MM, Graber M, Ahmad K, et al. Academic medicine : journal of the Association of American Medical Colleges. 2012;87:1428-33.

First-year residents who were allowed to nap for 20 minutes at midday had improved cognitive performance and fewer attentional failures than residents who did not nap. However, the study did not control for potential confounders, such as residents' caffeine intake.