group polarization in a group setting of like-minded individuals, pre-existing attitudes become more polarized from the opposing group and stronger

bystander effect the tendency for people/bystanders to not engage in helping the distressed due to the belief someone else will help them due to the fact there are others around

social loathing tendency for people in a group to exert less effort than what would exert, if they were on their own

• feel less accountable
• view individual contributions as unneeded
• overestimate own contributions and downplay the efforts of others
• free ride on other's efforts

we have a natural bias that we do more than we actually do