A study of two- to six-year-olds' spontaneous uses of "from" to mark oblique agents showed that, while the two-year-olds produced "from" for agents and "with" for instruments in imitation, older subjects shifted to "by" for agents and kept "from" to mark locative sources. (Author/CB)

Examination of the speech of eight mothers and eight fathers to their one- to two-year-olds (N=8) indicated that, while paternal speech was not more diverse than maternal speech, paternal speech did show greater use of rare vocabulary and lower use of common vocabulary. (Author/CB)

A longitudinal study of four 17- to 33-month-olds revealed that their linguistic selection at the one-word stage was governed by principles of informativeness, while the two-word stage was characterized by new, or a combination of new and old, information. (Author/CB)

Five studies examined the contributions of syllable-ordering and rhythmic properties of syllable strings to 6- and 9-month-old infants' speech segmentation. Results indicate that the capacity for integrating multiple sources of information in speech perception emerges between 6 and 9 months, in rough synchrony with the emergence of integration in…

Compares patterns of cluster realization from 47 children ranging in age from 3;4 to 6;8 with functional (nonorganic) speech disorders with those reported in the literature for normal acquisition and reveals that these patterns are essentially the same for both groups. (33 references) (GLR)

Provides evidence for developmental changes in the composition of the lexicon, reflecting a shift in emphasis from reference, to predication, to grammar. Findings show that the study of qualitative variation in lexical style is confounded by quantitative variation in rate of lexical development. Tables are appended. (Contains 42 references.) (JP)

Reports a case study of a British 2-year old that shows a stage in syntactic development without a subject agreement protection but with a tense phrase. A sharp contrast in use of verb forms suggests that the child had left the Optional Infinitive stage and entered a transitional stage, where the major development is that the status of the bare…

Topic choice, topic synchrony, and utterance function during mother-child play sessions at age 3 were examined in 32 late talkers and 21 comparison children, matched at intake on age, socioeconomic status, and nonverbal ability. Late talkers and comparison children did not differ in number of utterances, topic initiation, topic synchrony, use of…

A phonological investigation of four siblings with autism found persistence of several phonological processes such as labilization, cluster reduction, or final consonant deletion beyond the expected age, evidence of unusual sound changes such as extensive segment coalescence, frication of liquids, and velarization, chronological mismatch, and…

Examines naturalistic adult-to-child speech of Italian middle class mothers to determine which patterns characterize linguistic input to infants. Because Italian is a pro-drop language, adult-to-child speech revealed bias toward more salient semantic and morphological significance of verbs relative to nouns, and verbs will likely occupy…

Findings from several studies indicate: stressed and word-final unstressed syllables are preserved more than nonfinal unstressed syllables; word-internal unstressed syllables with obstruent onsets are preserved more than sonorant onsets; unstressed syllables with non-reduced vowels are preserved more than reduced vowels; and right-sided stressed…

The durational characteristics of novel words produced in repeated trials were evaluated in separate groups of children with, and without speech delay (SD). Children produced disyllabic novel words containing either a trochaic or iambic stress pattern. Results of acoustic analysis indicated a significant interaction between trial number and…

Children's understanding of the grammatical categories of "determiner" and "adjective" was examined using 2 different methodologies. In Experiment 1, children heard novel nouns combined with either a or the. Few 2-year-olds, but nearly all 3- and 4-year-olds, subsequently produced the novel nouns with a different determiner from the modeled…

This paper introduces the notion of frequent frames, distributional patterns based on co-occurrence patterns of words in sentences, then investigates the usefulness of this information in grammatical categorization. A frame is defined as two jointly occurring words with one word intervening. Qualitative and quantitative results from distributional…

Are morphological patterns learned in the form of rules? Some models deny this, attributing all morphology to analogical mechanisms. The dual mechanism model (Pinker, S., & Prince, A. (1998). On language and connectionism: analysis of a parallel distributed processing model of language acquisition. "Cognition," 28, 73-193) posits that speakers do…