Contagion effect, which refers to the spread of behaviors or attitudes among individuals in a group, can also be described using different terms. One synonym for it is social contagion, which suggests that this phenomenon spreads through social or cultural influence. Another term is emotional contagion, which specifically deals with the spread of emotions among people. The term ripple effect can also be used to describe how one action or event can have an impact on a larger group, leading to a chain reaction. Finally, herd behavior is another synonym for contagion effect, referring to the tendency of individuals to follow the crowd, acting in a way that may not be in their best interest.