Experiments examined auditory-visual integration of temporal relations in [human] infants. Each experiment had 2 groups of infants: one group was 1st presented with temporally synchronous auditory and visual signals during habituation trials and then non-synchronous signals during recovery; the other groups received the opposite sequence. The auditory and visual signals were spatially congruous in experiment 1, but were separated in experiment 2. Since the pulse rate of the visual stimuli was changed for the non-synchronous trials, a control group was tested which received only the light during habituation and recovery trials. The groups initially presented synchronous signals showed habituation and recovery. Neither group presented non-synchronous stimuli showed recovery. The group with the spatially separated sources habituated, while the group with the spatially congruous signals did not. Apparently, infants coordinate the temporal relations.