This study used an event-based approach to provide empirical evidence regar
ding the nature of coordination in 3- and 6-month-old infants. Vocalization
s and facial actions of 12 normally developing infants interacting with the
ir caregivers were coded. Coded vocalizations and facial actions were consi
dered coordinated when they temporally overlapped. Results indicate that in
fants coordinated their vocalizations and facial actions more than expected
by chance. Coordinated events were governed by 2 sequence patterns. When 2
communicative events were temporally associated across modalities, I event
tended to be completely embedded within the other, and vocalizations tende
d to end before facial actions. This study provides new information about h
ow infant communication is structured, confirms results from other coordina
tion studies, and describes a new method for analysis of event-based data.