Developmental changes in infants' bisensory response to synchronous durations☆

Abstract The present set of studies was concerned with the development of bisensory response to synchronous durations. Infants viewed pairs of checkerboards where each member of the pair flashed at the same rate but differed in the duration of each flash. Visual preferences were studied in silence as well as in the presence of a tone whose duration and onset/offset characteristics corresponded to one member of the visual pair of stimuli. Results indicated that 3-month-old infants did not make bisensory matches of duration. In contrast, 6- and 8-month-old infants exhibited evidence of bisensory matching in that, in general, their looking at the visual stimulus corresponding in duration to the auditory stimulus was greater than was their looking at the non-corresponding stimulus. Synchrony played a major part in this matching in that when the corresponding auditory and visual stimuli were put out of phase with one another, no evidence of bisensory matching was obtained.

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