Sleep deprivation can also cause mood changes, which can cause trouble in interpersonal interactions. A change in mood can also result in unusual quietness and social withdrawal.
A
study from 2018 concluded that sleep deprivation affects a person's energy, mood, risk-taking behavior, ability to pick up on social cues, concentration, and enthusiasm.
When someone has good quality sleep, they are less lonely and more social. Because of that, people who are able to get enough sleep are more able to engage in conversations with other people, more energetic in discussions, and less likely to become irritable.