Three studies are reported that deal with individual differences among children in the use of consonants during the early period of phonological development. The findings indicated that (1) children differ in their early phonologies, yet these differences do not extend beyond certain limits, (2) the linguistic environment cannot account for a number of these phonological differences, and (3) such differences are due in part to the fact that children's use of sounds varies considerably with the lexical items being produced. Modifications in theories of child phonology are suggested in order to account for these findings.

Several studies have reported that the articulatory abilities of Down's syndrome children are poor, but have provided little detail on the nature of the articulation problem. This paper presents a phonological analysis of the spontaneous speech of four Down's syndrome children, ages 3;10–6;3 including a) the phonetic inventory of each subject, b) a comparison of target consonant phonemes and the subjects' renditions of these phonemes, and c) a characterization of the subjects' errors in terms of phonological processes. The findings indicate that 1) although the subjects are capable of producing nearly all the consonant phonemes, correct production is often limited to a particular position within the word, 2) the phonological processes which account for the errors of the Down's syndrome subjects are similar to those reported for young normal children, and 3) the phonological abilities of the four subjects are comparable to, or better than, their general language ability as measured by MLU.

Six synthesized consonant-vowel syllables, three containing the phoneme /b/ in different vowel contexts and three the phoneme /d/, were presented randomly to developmental dysphasics and normal children. The ability to recognize that these six acoustically different stimuli shared two common phonemic categories (perceptual constancy) was investigated using nonverbal operantly conditioned response techniques. Results showed that although several children in both groups had difficulty with the task, the dysphasic group's performance was significantly poorer than the controls. Whereas the normal children improved significantly with age, the dysphasics did not. The results of this study suggest that speech perception, rather than being fully developed in infancy, changes throughout language development. By using procedures which have proven suitable for testing infants, with young children at various stages of language development, more might be learned about how the acoustic signal is encoded into speech and language and how this encoding changes throughout development or is disturbed in language disorders.

This study examined the differential mode usage (speech, vocalize, gesture and sign) of profoundly deaf preschoolers and their hearing mothers as a function of their level of communicative competence (high vs. low) and method of communication (simultaneous vs. oral). Language and mode use of twenty-eight hearing mother/deaf child dyads (equally divided into oral and simultaneous dyads) were recorded during free play. Findings indicated significant mode use differences as a result of both method of communication and level of competence within each method. Bimodal or simultaneous use of modes was related to both higher communicative competence in both oral and simultaneous children and specific pragmatic types of communication. Findings are discussed in relation to both theoretical and applied issues in understanding early childhood deafness.

The various descriptions of schizophrenic language have concentrated on a structural treatment of the schizophrenic's spoken or written language or an elucidation of the relationship between linguistic and cognitive disturbances. The structural treatments in fact often focus on the content of schizophrenic discourse, e.g. circumstantiality, flight of ideas, etc., rather than on grammatical structure. In this paper, the linguistic performance of a chronic schizophrenic, paranoid type (DSM-II:295.3) is examined via a large corpus of continuous spoken and written narrative texts collected over a three-year period. A striking agreement was noted in the oral and written language of this subject in features such as the types of agrammatic errors which occur and extreme perseveration. The data reveal important differences with the six characteristics of schizophrenic language noted by Chaika (1974). A brief comparison is made with aphasic and similar neurolinguistic disturbances suggesting organicity in the present case.

The purpose of the study was to investigate individual differences in French language achievement in a group of grade 1 anglophone students attending a total early immersion program. A number of different predictor factors were used to predict achievement in French language arts, listening comprehension and oral production; achievement in English reading was also assessed. The predictor factors included indices of the students' attitudes, personality traits, non-verbal reasoning ability, degree of field independence and school-related behavior. Multiple regression techniques were used to analyze the associations between the predictor factors and the results of the achievement tests.

Teachers' ratings of the students' behavior along with the cognitive factors of field independence and non-verbal reasoning ability were found to be positively correlated with achievement in French language arts and listening comprehension. The cognitive factors were also found to correlate positively with achievement levels in English reading. No significant predictors emerged in the case of oral production. The findings are discussed further in terms of their pedagogical implications.

In Study 1, writing samples from secondary and post-secondary students were used to examine the underlying structures of 16 indices of syntactic complexity known to be related to good writing. Factor analysis revealed six syntactic dimensions: unbound description, coordination, unbound description-final position, embedding, elongation, and prepositions. Subscales were constructed to assess each dimension. The purpose of Study 2 was to examine correlations among the six syntactic dimensions and three measures of cognitive style: field-embeddedness, category width, and perceptual accuracy. A coincidence of significant correlations between nearly all of the syntactic subscales and measures of both field-independence and reflectivity indicated an association between syntactic complexity and an analytic cognitive style. Preferred styles of organization applied to verbal and to visual stimuli alike. The ability to analytically perceive spatial relationships is clearly associated with the ability to manipulate language effectively.