Sleepless nights make people more selfish and asocial – study

Losing even one hour of rest reduces innate desire of humans to help one another', US research finds

When Ebenezer Scrooge woke up on Christmas Day after a fitful night's sleep, he realised he must renounce his stingy ways.

Unfortunately, the same is unlikely to happen for the rest of us, according to research suggesting sleepless nights make us more selfish.