The Effects of User Comment Valence of Facebook Health Messages on Intention to Receive the Flu Vaccine: The Role of Pre-existing Attitude Toward the Flu Vaccine and Psychological Reactance

International Journal of Advertising, 40(7), 1187-1208.

Abstract: This study examined if and how Facebook user-generated comments about the flu vaccine influenced psychological reactance in conjunction with pre-existing flu vaccine attitude. Psychological reactance was further tested as a mediating factor influencing behavioral intention to receive the vaccine. An experimental study was conducted with 264 college students. The results showed that pre-existing attitude positively influenced participants’ intention to obtain the flu vaccine through an increase (a decrease) in psychological reactance when there was inconsistency (consistency) between the pre-existing attitude and valence of comments. Collectively, the results demonstrate that psychological reactance is one possible theoretical mechanism through which social media users’ health behaviors are influenced by user-generated comments.

Jeong-Yeob Han  Hanyoung Kim  Hye Jin Yoon 

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