Hyper-articulation of vowel and consonant contrasts is often reported in infant-directed speech (IDS), but is not universal cross-linguistically, and may be a side-effect of speaking rate. This study investigated the voicing characteristics of the four-way oral stop voicing contrast in Nepali IDS. Both lead and lag time of word-onset/g,…

Reports on two studies on the acquisition by children of the voicing contrast in Mexican Spanish word-initial stops. The first was a longitudinal study. One analysis showed children unable to distinguish between voiced-voiceless stop cognate pairs at age 3;10. A spirantization analysis, however, more clearly revealed the children's phonological…

Reports on an experiment which sought to compare child and adult speech in terms of (1) stop productions evidencing devoicing during consonant closure, and (2) consonant closure evidencing voicing in the case of devoiced stops. (Author/AM)

This paper examines the acquisition of English fricatives and is a preliminary report on one aspect of the Child Phonology Project at Stanford University. A characterization of English fricatives is presented, followed by a summary of current information on their acquisition. Three sample hypotheses from the Stanford project are discussed in…

Analysis of longitudinal data from four Mexican-American children to explore two aspects of the acquisition of Spanish word stress indicates that children approach such learning unbiased toward any particular stress type. Children's attention to phonetic or semantic aspects of normatively unstressed syllables leads them to shift stress to that…

Revised version of a paper presented to the Canadian Linguistic Association Annual Meeting, Montreal, Quebec, 1972; research partially supported by the Canada Council. (DD)

Reports on a longitudinal study of the acquisition of the voicing contrast in American English word-initial stop consonants as measured by voice-onset time. The rate and nature of the developmental process are discussed in relation to two competing models of phonological acquisition and two hypotheses regarding the skills being learned. (Author/AM)

Forty third-graders and an equal number of sixth-graders listened to a list of words and for each word had to indicate, by saying "old" or "new," whether it had appeared before on the list or not. The subjects gave more erroneous "old" responses to words which were semantically or phonetically related to previously heard words than to control…

Part one of this study discussed the characteristics of errors involving single fricative consonants made by English children learning their first language. Here, the second part discusses the distinctive features of the single fricatives most commonly mispronounced, as well as the characteristics of errors with clustered fricatives. (34…

A distinction is made between the acquisition of phonetics and of phonology. Their interaction and the ways in which they interfere with each other are discussed. Data on the acquisition of English fricatives for several children are given, and are analyzed separately for the phonological and phonetic aspects of acquisition. (Author/CLK)

A study was conducted of the development of consonant clusters in the phonology of a native English-speaking child. His progress was studied over a year and a half period, in three one-month segments. His speech was recorded by tape and transcribed. Techniques used to elicit consonant clusters included real word imitation, imitation of nonsense…

Distinctive feature specification and representation in phonological acquisition are examined in 30 children in the context of underspecification theory. Three questions were addressed: which features do children use to categorize segmental information; do the defining features of a category shift as the phonological system advances; and which…

The categorizations which humans make of the concrete world are not arbitrary but highly determined. In taxonomies of concrete objects, there is one level of abstraction at which the most basic category cuts are made. Basic categories are those which carry the most information, possess the highest category cue validity, and are, thus, the most…

This investigation studied (1) the acquisition and proportion of correct usage of consonants of Japanese and American children, (2) the consonant substitutions of children developing normal language and of children with articulation problems, and (3) confusion in adults' recall of consonants. A system of distinctive features (gravity, diffuseness,…