Discrepancy between angl head turn and loudspeaker location was measured on infants in auditory-alone and auditory-visual trials. Age and loudspeaker location had no effect on performance in auditory-visual trials. However, in auditory-alone trials, there were significant age differences. (PCB)

In 4 studies, 7.5-month-olds used synchronized visua-lauditory correlations to separate a target speech stream when a distractor passage was presented at equal loudness. Infants succeeded in a segmentation task (using the head-turn preference procedure with video familiarization) when a video of the talker's face was synchronized with the target…