Even the loss of a single night's sleep can affect our ability to concentrate. When we lose sleep, we have more trouble thinking on our feet. Creative thinking becomes more difficult. In laboratory experiments, people deprived of sleep become moody and grim. Small sleep losses building up over time can cause erratic behavior and irritability.
Lack of sleep can also make interpersonal relationships more discordant.
The psychological consequences of sleep deprivation can range from negative mood and general malaise to feelings of poor health and unhappiness. Make sleep a priority. Consolidate your sleep. You'll feel more rested if you have one solid period of sleep than if you parcel it out over the course of the day. Compensate with healthy eating habits.