Adolescent girls reported on their experiences both as perpetrators and as victims of several distinct forms of relational aggression. Details of these incidents were gathered from 114 ethnically diverse ninth and tenth graders via a secure online survey. The frequency with which girls perpetrated or were targeted for particular acts of relational aggression was assessed and, based on the responses, a computer program randomly selected one item (i.e., gossip, ignoring, or exclusion) for which each girl was asked to recall a specific experience and answer follow-up questions. Perceptions of the goals and functions of specific relationally aggressive acts were assessed, as well as how the perpetrator or victim felt at the time of the incident. Ignoring or giving the silent treatment appeared to be a unique form of relational aggression inasmuch as the girls perceived different motives, or functions, for ignoring compared with gossip and exclusion and felt worse at the time of the ignoring incident, both when they were reporting as aggressors and as victims. (Contains 2 figures and 2 tables.)