Conformity Bias 

Conformity bias is the tendency to change one’s beliefs or behaviour to fit in with others. Instead of using their own judgment, individuals often take cues from the group they are with, belong to, or seek to belong to about what is right or appropriate. They then adapt their own behaviour accordingly. For example, they may corroborate the eyewitness account of someone else within the group (particularly an authority figure) even if they did not see the event in question.