The number of unique words in children's speech is one of most basic statistics indicating their language development. We may, however, face difficulties when trying to accurately evaluate the number of unique words in a child's growing corpus over time with a limited sample size. This study proposes a novel technique to estimate the latent number…

Establishing local coherence relations is central to text comprehension. Positive-causal coherence relations link a cause and its consequence, whereas negative-causal coherence relations add a contrastive meaning (negation) to the causal link. According to the cumulative cognitive complexity approach, negative-causal coherence relations are…

Neighbourhood Density (ND) and Phonotactic Probability (PP) influence word learning in children. This influence appears to change over development but the separate developmental trajectories of influence of PP and ND on word learning have not previously been mapped. This study examined the cross-sectional developmental trajectories of influence of…

Children typically acquire their native language naturally and spontaneously at a very young age. The emergence of early grammar can be predicted from children's vocabulary size and composition (Bates et al., 1994; Bates, Bretherton & Snyder, 1998; Bates & Goodman, 1997). One central question in language research is understanding what…

The present study investigates flexibility of verb use in the early stages of English multiword development, and its relationship with patterns attested in the input. The data is taken from a case study of a monolingual English-speaking boy aged 2; 5-2; 9 and his mother while engaged in daily activities in the home. Data were coded according to…

This paper presents a large-scale cross-sectional study of Danish children's early language acquisition based on the Danish adaptation of the "MacArthur-Bates Communicative Development Inventories" (CDI). Measures of validity and reliability imply that the Danish adaptation of the American CDI has been adjusted linguistically and culturally in…

This case study of two Latvian children attempts to show how the parental terms for"mummy" and "daddy" in Latvian are acquired, paying particular attention to the changing relationship between the input and output forms during the acquisition process. (Author/RM)

A child with chronic otitis media with effusion solved the problem of reduced and fluctuating auditory input with phonological selection and avoidance strategies that capitalized on prosodic cues. Findings illustrate the need to consider interactions among performance, input, and linguistic constraints to explain individual variation in language…

Most children aged 1;6 to 2;0 begin to use utterances of two words or more. It is therefore important for child phonologists to consider the development of phonetic and phonological phenomena that characterize connected speech. The longitudinal case study reported here investigated three juncture types--assimilation, elision and liaison--in the…

Examines speech samples of a boy 2;4 to 2;11 to determine the relationship between speech disturbances and language production process development. Disfluencies were randomly distributed during the first half of the observation period, then concentrated in function words and sentence initial words, reflecting an emerging speech component dedicated…

Case studies are presented for two early talkers, one of whom represents a striking dissociation between vocabulary size and mean length of utterance. Each child is compared to controls in the same language stage, and the data are examined to determine whether the dissociation is best characterized as one between grammar and semantics, or a…

Bilingual case study of infant acquiring Spanish and English from birth to 1;10 is used to address whether young bilinguals differentiate between their languages based on language choice. Daily diary records and weekly video recordings in the two language contexts were used to construct the child's lexicon and establish that translation…

This paper reports on a case study of a Cantonese-speaking child age 2 and considers the implication of tone acquisition for tone studies in general, and Cantonese tonology in particular. (NCR)

Describes the presence of a phonological selection strategy and consonant harmony rule in one child's developing phonological system. Evidence suggests that this constant harmony constraint operated across morpheme boundaries, causing a delay in the onset of two-word utterances and influencing the selection of words that could occur in word…

Describes a preschool child's gradual acquisition of a play language, Pig Latin, and discusses the abilities and errors that were measured over the course of acquisition. Acquisition improved as the subject developed language abilities involving word identification, first-consonant deletion, suffix creation, and short-term memory for speech units.…