Walther argues online relationships are more personal and involve greater self-disclosure than FtF because CMC relationships can develop very quickly as self disclosure happens earlier and once established is more intense and intimate
Can also end more quickly because high excitement isn't matched by level of trust (Cooper and Sportolari called this boom and bust phenomenon)
Key feature is sender has more time to manipulate online image than in FtF (selective self-presentation), people have control and can manipulate self-disclosure to promote intimacy, self-presenting in positive idealised way
Bargh et al suggest the outcome is rather like stranger of trains effect in FtF relationships -> when other people don't know your identity, you feel less accountable for your behaviour so may disclosure more.