Past research has indicated that English-learning infants begin segmenting words from speech by 7-5 months of age (Jusczyk & Aslin, 1995). More recent work has demonstrated, however, that 7-5-month-olds' segmentation abilities are severely limited. For example, the ability to segment vowel-initial words from speech reportedly does not appear until 13.5 to 16 months of age (Mattys & Jusczyk, 200...

background and aim: age implantation is one of the effective factors on speech production outcomes in cochlear implanted (ci) children. the purpose of this study is to determine the role of age implantation on formant frequencies and production of three persian vowels including /a/, /u/, /i/ in ci children. methods: sixty nine congenitally deaf children who received ci were divided into three g...

in this paper, the efficiency of persian speech phonemes from the point of view of efficiency in speaker recognition has been studied, and then with due attention to efficiencies, the ranking of phonemes has been done. for estimating the efficiencies of phonemes, we have introduced one criterion that has been defined in the form of phonemes “inter speaker distance” to “intra speaker distance” r...

The current study conducted three phoneme-detecting experiments in order to (1) provide further evidence for the Japanese listeners’ sensitivity to moraic structure and (2) treatment of diphthongs by three groups of language users (Japanese listeners, English listeners and semi-bilingual Japanese speakers of English). Japanese natives showed sensitivity to the moraic structure even when the mor...

The developmental properties of vowel devoicing were investigated for 72 children of 4 and 5 years of age, and 37 adults in two dialects of Japanese. One was the Osaka dialect, with a low devoicing rate, and the other the Tokyo dialect, with a high devoicing rate. In the Tokyo dialect, the devoicing rate of children significantly increased and reached an adult-like level by the age of 5 years, ...

Eight experiments tested the hypothesis that infants' word segmentation abilities are reducible to familiar sound-pattern parsing regardless of actual word boundaries. This hypothesis was disconfirmed in experiments using the headturn preference procedure: 8.5-month-olds did not mis-segment a consonant-vowel-consonant (CVC) word (e.g., dice) from passages containing the corresponding phonemic p...

Children look longer at a familiar object when presented with either correct pronunciations or small mispronunciations of consonants in the object's label, but not following larger mispronunciations. The current article examines whether children display a similar graded sensitivity to different degrees of mispronunciations of the vowels in familiar words, by testing children's sensitivity to 1-...