The third-person effect [1] hypothesis predicts that people tend to perceive that mass media messages have a greater effect on others than on themselves, based on personal biases. The third-person effect manifests itself through an individual's overestimation of the effect of a mass communicated message on the generalized other, or an underestimation of the effect of a mass communicated message on themselves.
These types of perceptions stem from a self-motivated social desirability (not feeling influenced by mass messages promotes self-esteem), a social-distance corollary (choosing to dissociate oneself from the others who may be influenced), and a perceived exposure to a message (others choose to be influenced by persuasive communication).[1] Other names for the effect are "Third-person perception" and "Web Third-person effect". From 2015, the effect is named "Web Third-person effect" when it is verified in social media, media websites, blogs and in websites in general.[2]