"Emergency situations seem to amplify people's natural tendency to cooperate," said one of the researchers Mehdi Moussaid from Max Planck Institute for Human Development in Berlin, Germany.

In the study published in the journal Scientific Reports, the researchers showed that readiness to help depends heavily on personality. 

The experiments showed that pro-social and altruistic people in particular often helped others even more in an emergency situation than in a relaxed and non-threatening situation, whereas selfish participants became less cooperative.

The researchers invited 104 individuals to participate in a computer game that was developed specifically for the experiment. 

In this "help-or-escape dilemma game," participants under time and monetary pressure had to decide whether they were willing to risk taking time to help others before reaching their goal or saving themselves in two different situations ? one everyday and one emergency situation. 

After the game, the researchers measured participants' social value orientation -- that is, their concern for others -- and categorised them as having a pro-social or individualistic profile.

The researchers found that many of those categorised as pro-social were more helpful in the emergency situation -- 44 per cent of them were more ready to help in the emergency than in the everyday situation. 

The opposite was true of participants categorised as individualistic, 52 per cent of whom reduced their cooperative behaviour in the emergency situation.