The study analysed spectral and tongue shape dynamics of voiceless alveolar and postalveolar fricatives produced by ten children learning Scottish English. Synchronised ultrasound tongue imaging data and acoustic data were used to characterise children's productions of the phonemic contrast. Six children had consistently accurate productions of…

Pronunciation variation is under-studied in infant-directed speech, particularly for consonants. Regressive place assimilation involves a word-final alveolar stop taking the place of articulation of a following word-initial consonant. We investigated pronunciation variation in word-final alveolar stop consonants in storybooks read by forty-eight…

This study investigated the relation between lexical development and the production of prosodic prominence in disyllabic babble and words. Monthly recordings from nine typically developing Belgian-Dutch-speaking infants were analyzed from the onset of babbling until a cumulative vocabulary of 200 words was reached. The differentiation between the…

Most computational models of word segmentation are trained and tested on transcripts of speech, rather than the speech itself, and assume that speech is converted into a sequence of symbols prior to word segmentation. We present a way of representing speech corpora that avoids this assumption, and preserves acoustic variation present in speech. We…

This study assesses the extent of phonetic continuity between babble and words in four Italian children followed longitudinally from 0;9 or 0;10 to 2;0--two with relatively rapid and two with slower lexical growth. Prelinguistic phonetic characteristics, including both (a) consistent use of specific consonants and (b) age of onset and extent of…

The phonetic characteristics of canonical babbling produced by Korean- and English-learning infants were compared with consonant and vowel frequencies observed in infant-directed speech produced by Korean- and English-speaking mothers. For infant output, babbling samples from six Korean-learning infants were compared with an existing English…

The early development of vocalic and consonantal production in Mandarin-learning infants was studied at the transition from babbling to producing first words. Spontaneous vocalizations were recorded for 24 infants grouped by age: G1 (0 ; 7 to 1 ; 0) and G2 (1 ; 1 to 1 ; 6). Additionally, the infant-directed speech of 24 caregivers was recorded…

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…

This article discusses a study designed to obtain some information regarding the nature of the awareness children have of their own articulatory activity and the level of mental development at which this awareness appears. (Author/CFM)

Examines the relationship between phonetic substitution patterns in child speech and sound change patterns in dialects of adult language, basing an explanation of these phenomena on acoustic data and language universals. (AM)

When Israeli four- to six-year-olds (N=120) wrote pairs of nouns sharing a syllable and sentences sharing either mainly nouns or mainly verbs, analysis indicated that the older the children, the more their invented writing reflected common linguistic elements and length of utterance. Nouns were represented in children's written productions earlier…