This investigation tested a theoretical model of communication behavior with specificFacebook friends, such that attitudes toward (a) online self-disclosure, and (b) online social connection, predict Facebook communication frequency and, in turn, relational closeness. Participants included both undergraduates and older adults. Results generally supported the model, with the interaction effect between self-disclosure and social connection directly predicting Facebook communication and indirectly predicting relational closeness. For both dependent variables, online social connection was a positive predictor at low and moderate levels of online self-disclosure, but high levels reduced the association to nonsignificance. One implication of these results was that high-warrant information may discourage those with social anxiety from social network site communication.