Objective:In order to explore the mutual predictive relationship between passive social network site use and fear of missing out.

Methods:A one-year longitudinal design was adopted. 652 college students were convinently selected from 2 colleges in Heilongjiang Province measured twice by Passive Social Network Site Use Scale (PSNSUS) and Fear of Missing Out Scale (FOMOS). The structural equation model was used to conduct cross-lagged analysis.

Results:There was a significant positive correlation between PSNSUS and FOMOS scores measured twice(r=0.44，0.45, P<0.01). The results of cross-lagged analysis indicated that, after controlling for the correlation between PSNSUS and FOMOS at time 1 and time 2, pre-test PSNSUS had a significant effect on post-test FOMOS (β=0.55，P<0.01), and the predictive effect was stronger among female students. pre-test FOMOS has a significant effect on post-test PSNSUS (β=0.11, P<0.05), and the predictive effect was stronger among male students.

Conclusion:It suggests that passive social network site use and fear of missing out could predict eachother in college students.