The 'root infinitive' phenomenon in child speech is known from major languages such as Dutch. In this case study, a child acquiring the Papuan language Nungon in a remote village setting in Papua New Guinea uses two different non-finite verb forms as predicates of main clauses ('root' contexts) between ages 2;3 and 3;3. The first root non-finite…

This article demonstrates how the Comparative Method can be applied to cross-linguistic research on language acquisition. The Comparative Method provides a systematic procedure for organizing and interpreting acquisition data from different languages. The Comparative Method controls for cross-linguistic differences at all levels of the grammar and…

What are the sources of variation in the input, and how much do they matter for language acquisition? This study examines frequency variation in manner-of-articulation classes in child and adult input. The null hypothesis is that segmental frequency distributions of language varieties are unigram (modelable by stationary, ergodic processes), and…

Current views on the acquisition of PRO can roughly be divided into two areas: lexical and syntactic accounts. We present data on one verb, "decide," that yields data that not only differs from the data for other similar verbs with the same children, but does not lend itself easily to either type of account. Data from a sentence elicitation task…

Describes one child's early productions of lexical primary stress, using as a framework the following questions: (1) Is conventional stress used consistently? (2) Are there other alternatives for the placement of primary stress? (3) Does stress assignment appear to be random? (4) Does stress assignment appear to vary with spontaneous vs. imitative…

Presents a case study of the babbling monologues produced by a Dutch child in the six weeks following acquisiton of the first word, which shows that this child's word production and his concurrent babbling are very much related. Concludes that word production influences the course of babbling and vice versa. (SED)

An infant girl's unusual phonological behavior was evaluated in light of a maternal model which appeared to exaggerate features of normal conversational speech. Parental responses to immature speech patterns may account for selected case study behaviors which have been reported in both the child phonology and child fluency literatures. (KM)

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)

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…

Examined whether infants imitate the vocal pitch characteristics of adult caregivers and differentially adjust their vocal pitch or fundamental frequency toward that of their caregivers. Data are presented from a longitudinal case study of an infant recorded over several months, interacting with each parent. The infant did not demonstrate…

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…

Results of a longitudinal case study of a monolingual Sesotho-speaking boy show that rule-assigned tone on subject markers is marked appropriately by age two. Underlying tonal representations on verb roots are learned gradually over time, showing an early Default High tone pattern. (Contains 51 references.) (Author)

Investigates how early a developing bilingual who is exposed simultaneously to English and Spanish can make appropriate language choices. Kept detailed records of the child's cumulative vocabulary from the first word at 10 months and on weekly audiovideo recording in both Spanish and English contexts from age 1-3. (Author/VWL)