一个人的行为受到其他人行为影响从而做出一致行为的现象，就像羊群中头羊走哪后面的羊群跟哪，全然不顾边上有没有狼也不管是不是有更好的草地的道理一样。羊群效应也叫“从众效应”。
“Herd Effect” – The phenomenon that a person’s behavior is influenced by other people’s behavior and thus behaves in a consistent manner is like a flock of sheep. Where the first sheep leads, the sheep behind blindly follows regardless if there will be wolves or greener grass on the side.