Addresses questions about infant perceptual ability and the possibility of its decline as a function of development in the absence of specific experience. Compares English-speaking adults, Hindi-speaking adults, and 7-month-old infants on their ability to discriminate two pairs of natural Hindi (non-English) speech contrasts. (Author/RH)

Two studies were conducted, one to judge the relative ages of pairs of vocalizations from Chinese and American infants of varying ages, the other to judge the linguistic community of the vocalizer when age was held constant. Judgments were highly accurate in the first study, but not in the second. (Author/RM)

English-speaking children and adults who were learning Dutch at school and at work, without signigicant amounts of foreign language instruction, were tested at five-month intervals during their first year in Holland. The test battery included tests for active and passive control of phonology, morphology, syntax and vocabulary. Significant…

Numerous findings suggest that non-native speech perception undergoes dramatic changes before the infant' s first birthday. Yet the nature and cause of these changes remain uncertain. We evaluated the predictions of several theoretical accounts of developmental change in infants' perception of non-native consonant contrasts. Experiment 1 assessed…

The experiments described in this report seek to investigate the characteristics of speech perception using an approach which considers the development of the perception of "voicing," both as it occurs naturally and as it might occur in the laboratory. Investigating voicing discrimination and perception training among adults, infants, and…

Infants under six months are able to discriminate native and non-native consonant contrasts equally well, but as they learn the phonological systems of their native language, this ability declines. Current explanations of this phenomenon agree that the decline in discrimination ability is linked to the formation of native-language phonemic…