Analyze the Following Study According to the Criteria Set by Your

Analyze the following study according to the criteria set by your instructor:
As reported in the Journal of the American Medical Association, 26 surgeons-in-training were studied to see whether sleep deprivation impaired their patient-care ability. For 18 to 19 days the residents kept a sleep diary and underwent five tests each morning to measure cognition, visual and auditory alertness, and hand-eye coordination. Sleep deprivation was defined as less than 4 hours of continuous sleep in the previous 24 hours, which occurred in 89 percent of the on-duty nights studied. When sleep deprivation occurred, total sleep averaged 3 hours, and the longest uninterrupted sleep averaged 2.2 hours.
Residents did show "trivial" improvement on two tests when they obtained some sleep just before testing, but the researchers said repetitive sleep deprivation did not impair the residents' test performances.
The study "does not support arbitrary recommendations to limit working hours of residents," it was said.
-Adapted from Science News