In order to determine the effects of napping and resting on mood and performance for nappers and nonnappers, 48 habitual nappers and 46 habitual nonnappers were randomly assigned to take a nap, to rest in bed without falling asleep, or to watch a neutral videotape (control group). Measurements were obtained from a 10-min auditory reaction time task, a 10-min addition task, and three self-report mood measures 15 min before and after each condition. Subjects in the nap and rest conditions had electrodes attached for recording EEG, EOG, and EMG during the hour-long treatments. Results showed that napping and resting served to improve mood regardless of whether a person habitually naps or not. Sleep itself may not be crucial in improving mood; what may be more important is the period of relaxation common to napping and resting in bed. Overall, performance measures were not affected by either napping or resting.