To investigate possible influences on and consequences of mothers' speech, specific infant behaviors preceding and following four pragmatic categories of mothers' utterances--responsive utterances, supportive behavioral directives, intrusive behavioral directives, and intrusive attentional directives--were examined longitudinally during dyadic free play at ages 13, 17, and 21 months. Analyses revealed developmental increases in children's positive social and object-directed behaviors before and after maternal speech. Responsive utterances were the most likely to be preceded by social and object initiatives and more likely than intrusive directives to occur following high toy interest. Although mothers' intrusive behavioral and attentional directives were often preceded by infants' disengagement from play and toys, they were followed by infants' greater levels of toy interest. Infants' rates of compliance were substantial following all directives. The findings reveal differential behavioral circumstances preceding and following mothers' responsive versus directive speech and their supportive directive versus intrusive directive utterances.