[04-30-09] All members present

Diffusion of Responsibility:
Diffusion of responsibility is the idea that people are less likely to intervene to help someone who seems to need it if there are others present, because they perceive responsibility as being shared between all present, and therefore see themselves as being less responsible personally.

Bystanders effect:
The bystander effect is a social psychological phenomenon in which individuals are less likely to offer help in an emergency situation when other people are present. The probability of help is inversely proportional to the number of bystanders. In other words, the greater the number of bystanders, the less likely it is that any one of them will help.[1]