Susceptibility to social influence (SSI) has been reported as a key factor for social influence in online social networks (OSNs) such as Facebook, Instagram, and Twitter. In four online studies, we show that the personality trait of SSI, namely the susceptibility to normative influence (SNI), predicts the extent to which Facebook users comply with the behavior of others on Facebook (e.g., buying, voting, or visiting what other OSN users post). In Studies 1a and 1b, we find that SSI correlates with diverse OSN behaviors, which are the typical results of being affected by social influence. In Study 1b, we find that the perceived importance of the topic of OSN behaviors (e.g., fashion or politics) moderates the effect of SNI on OSN behavior, with a higher importance resulting in a stronger effect of SNI on OSN behavior. In Studies 2 and 3, we find that SNI predicts the extent Facebook users hypothetically "like" diverse topics on Facebook. We also find partial support for the idea that there are interactions between SNI and the Big Five personality traits (i.e., openness, conscientiousness, extraversion, agreeableness, and neuroticism) on OSN behavior. Specifically, the extent to which the Big Five personality traits of openness, agreeableness, and neuroticism predict OSN behavior depends on Facebook users' SNI. Our studies contribute to research on the personality-based prediction of OSN behavior and help in better understanding the dynamics of social influence in OSNs, underlining the vulnerability of susceptible OSN users.
OPEN ACCESSCitation: Stöckli S, Hofer D (2020) Susceptibility to social influence predicts behavior on Facebook. PLoS ONE 15(3): e0229337. https://doi.org/ 10.
Funding:The authors received no specific funding for this work.
Competing interests:The authors have declared that no competing interests exist.to informative influence (SII), that is, one's tendency to seek information from others to reduce uncertainty in a situation [6,7]. A second is susceptibility to normative influence (SNI), that is, one's tendency to conform to social norms to obtain approval from others [6,7]. Finally, there is lack of resistance to social influence (LRSI), that is, one's lack of skepticism toward information from others and hence the tendency to undermine one's independence [8][9][10]. Having said this, a susceptible person compared with an unsusceptible person is typically more readily influenced by others-be it because of seeking information about a new product from others, because of conforming to others' expectations of what fashion style to wear, or because of not questioning others' posts about a political issue.So far, there have been only a few studies testing the idea that SSI predicts to what extent users are influenced by others in OSNs [11][12][13]. For instance, it has been found that SSI predicts who is affected by others' Facebook posts: susceptible Facebook users are affected by the content posted by all kinds of Facebook members, and unsusceptible Facebook users are affected only by "close" Fac...