bandwagon effect
Noun
Meaning
the phenomenon of a popular trend attracting even greater popularity
Source: WordNetSynonyms
Hypernyms
Related terms
Examples
I would in fact tend to have more confidence in the outcome of a democratic decision if there was a minority that voted against it, than if it was unanimous... Social psychology has amply shown the strength of this bandwagon effect.
in periods of high merger activity there is a bandwagon effect with more and more firms seeking to engage in takeover activity
polls are accused of creating a bandwagon effect to benefit their candidate