What Was Found in the Featured Study Regarding the Effects

Multiple Choice

What was found in the Featured Study regarding the effects of sleep deprivation?

A) Sleep deprivation had little effect on the ability to perform cognitive tasks.
B) Sleep deprivation had a substantial negative effect on mood.
C) Sleep deprivation had a substantial positive effect on the ability to perform cognitive tasks because the subjects compensated by increasing their effort.
D) The subjects were only moderately aware of the actual negative effects of the deprivation.