The present study tracked 6-13 month-old Japanese infants' eye gaze when they observed either their mother or a stranger reciting a monologue. The purpose of this study is to examine the impact of age and face type (mother and stranger) on 1) how visual and auditory cues are employed and 2) which face parts (eye, nose and mouth) infants attend to. Our results revealed that infants started to prefer mother's voice regardless of the face type at 12 months-old and at the same time, they shifted their attention from the eyes to the mouth regardless of the face type. This shift appears about 4 months later as compared with that reported for English learning infants, suggesting that the developmental change for use of visual and auditory cues varies according to language/cultural environment.
