The MacArthur-Bates Communicative Development Inventories (CDIs) are a widely used family of parent-report instruments for easy and inexpensive data-gathering about early language acquisition. CDI data have been used to explore a variety of theoretically important topics, but, with few exceptions, researchers have had to rely on data collected in…

This study investigates the emergence and development of the discourse-pragmatic functions of the Japanese subject markers "wa" and "ga" from a usage-based perspective (Tomasello, 2000). The use of each marker in longitudinal speech data for four Japanese children from 1;0 to 3;1 and their parents available in the CHILDES…

Corpora of child language are essential for research in child language acquisition and psycholinguistics. Linguistic annotation of the corpora provides researchers with better means for exploring the development of grammatical constructions and their usage. We describe a project whose goal is to annotate the English section of the CHILDES database…

LChildren pass through a stage in development when they produce utterances that contain auxiliary BE ("he's playing") and utterances where auxiliary BE is omitted ("he playing"). One explanation that has been put forward to explain this phenomenon is the presence of questions in the input that model S-V word order (Theakston, Lieven & Tomasello,…

Fikkert (1994) analyzed a large corpus of Dutch children's early language production, and found that they often add targetless syllables to their words in order to create bisyllabic feet. In this note we point out a methodological problem with that analysis: in an important number of cases, epenthetic vowels occur at places where grammatical…

Edwards (1992c) concerns data and data use rather than manuals. It presents principles to facilitate reliable archive research in an imperfect world. MacWhinney and Snow (1992) endorse the principles but disagree on important details, discussed in this response. (21 references) (KM)

Presents four principles for archive-based language research: maximum readability and minimum bias; consistent encoding for exhaustive computer search; systematic contrastiveness; and data comparability in elicitation, transcription and coding. Examples from existing computer archives illustrate these and other principles, and strategies are…

Provides critical analysis of Edwards (1992) presentation of a set of examples from the Child Language Data Exchange System as prototypes of bad transcription practice. The analysis argues that Edward's approach causes the development of an overly rigid set of principles that could stop progress in the analysis of spontaneous language samples.…

The ISU/ChiLDES bibliographic database, a nonprofit computerized database dedicated to language acquisition, currently consists of nearly 1,900 annotated bibliographic references to journal articles dating back to 1972. (CB)

Examines the Child Language Data Exchange System (CHILDES), its organizational form, and its three major tools: (1) the CHILDES database of transcripts, (2) the CHAT system for transcribing and coding data, and (3) the CLAN programs for analyzing CHAT files. (GLR)

Describes the Human Communication Research Centre Dialogue Database. The database consists of over 700 transcribed and coded dialogues from pairs of speakers aged from 7-14. The speakers are recorded over 2 years while tackling cooperative problem-solving tasks, and the same pairs of speakers are recorded over 2 years tackling 10 different…

Describes the formation of the Child Language Data Exchange System (CHILDES), a system formed to foster the sharing of computerized data on language acquisition. Details the governance of the system, the nature of the database, the shape of the coding conventions, and the types of computer programs being developed. (SED)

In this study, phonological similarity neighborhood sizes were calculated for expressive lexicon derived from 2 vocabulary lists representative of children aged 1;3 to 3;0. Over 80% of the words in these early lexicons had at least one phonological neighbor; nearly 20% had six or more phonological neighbors. (Contains 29 references.)

Offers additional means of evaluating parent speech by examining frequencies of individual nouns, verbs, and descriptors, and examining the learning task presented to children. Study one examines transcripts from the CHILDES database of English-speaking parents' speech to children at five developmental levels; study two examines 50 transcripts of…