When we a see a long queue of people or a crowd of people we naturally think “what’s going on over there?”. Along the same lines when a group of people say “I’ve used this product and it’s really good” we start to build a picture that this product must be good. Sometimes we even put to the side our own beliefs and ideas to follow the group. This all ties back to the cognitive bias called the “bangwagon effect” as which is described as:
The human understanding when it has once adopted an opinion (either as being the received opinion or as being agreeable to itself) draws all things else to support and agree with it.
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