The ability to communicate and cooperate is essential for successful social interaction. Previous research shows that sleep loss has a negative effect on a range of cognitive and emotional functions as well as on how irritable and sociable one feels. Despite the clear indications that sleep loss may have serious social consequences, it is largely unknown how our social abilities are affected by lack of sleep. The aim of this project is therefore to investigate how sleep loss affects social interaction, specifically regarding communication, cooperation, and helpfulness.

In an experimental design, 180 participants (90 with normal sleep and 90 sleep deprived) will be divided into 30 sleep-deprived pairs, 30 pairs where one part is sleep deprived and the other is well rested, and 30 pairs where both are well rested. We will then measure the pairs communicative abilities when giving and following instructions, and their cooperative abilities when collaboratively working on solving difficult problems. We will also assess how sleep loss affects helpfulness and emotions when interacting with others during these situations of high cognitive load.

The project will provide new and fundamental knowledge about the social consequences of sleep deprivation. The study is highly relevant in today s society since our ability to communicate and cooperate is vital in both our personal and working life, in everything from routine everyday situations to complicated professional demands.