In the Study Described in Your Text on 24 Hours

In the study described in your text on 24 hours of sleep deprivation in college students, what was the difference between objective and subjective measures of performance?

A) Sleep-deprived subjects performed more poorly on tasks, but overestimated the effect of sleep deprivation.
B) Sleep-deprived subjects performed poorly on tasks, but felt that they performed well.
C) Sleep-deprived subjects showed no change in actual performance, but felt that they had performed more poorly.
D) Objective and subjective measures of performance were identical.