The possibility that early linguistic experience affects infant speech perception was investigated in a cross-linguistic study with naturally produced speech stimuli. Using the Visually Reinforced Infant Speech Discrimination paradigm, three contrasts were presented to Spanish-and English-learning infants 6–8 months of age. Both groups of infants showed statistically significant discrimination of two contrasts, English and Czech. Only the Spanish-learning infants provided evidence of discrimination of the Spanish contrast. The groups discriminated the English contrast at similarly high levels, but the Spanish-learning infants showed significantly higher performance than the English on both the Spanish and the Czech contrast. The results indicate that early experience does affect early discrimination, and further (since the stimuli were natural) that the effect may be of practical consequence in language learning.

This article will treat attention to variability as a perceptual structure which mediates the transition from sensorimotor activity to language. The guiding idea is that the attentional system is geared to variability from the very beginning of life and that a speaker's language use is coordinated with this system as it emerges.

Several studies have investigated the effect of a particular linguistic environment on infants' discrimination of voicing for stop consonants. Exposure to contrasts phonemic for a community has been said to heighten preverbal infants' sensitivity to these contrasts.

This paper argues that phonetic input cannot be specified and ‘experience’ cannot be defined in this context without knowing how infants perceptually structure speech input. Consequently, the discrimination paradigm provides no test for the effect of experience on infants' speech discrimination. The conditions to be met in order to conclude an effect of experience are outlined.

Many early words encode aspects of plans, that is, actions performed in order to bring about events. Gone and down encode the fact that an action is intended to bring about a certain type of event. There and oh dear encode the success or failure of plans, no encodes the rejection of a plan. More encodes the repetition of a plan. It is argued that the concepts encoded by gone and down are like the concepts that underlie trial- and-error problem-solving and are developed after 12 months. The more abstract concepts encoded by there, oh dear, no and more are associated with the development of insight after 18 months. These early words are acquired because they are relevant to the child's cognitive problems.

This paper explores differences in conversational style among mothers. Although previous research suggests that many aspects of mother speech to the child covary in a way which serves the underlying intention of the mother, it was unclear whether such clusters of conversational behaviour would prove useful in characterizing stylistic differences among mothers across time. An analysis of the functionally-coded speech of 11 mothers showed statistically significant variability among mothers, especially in those behaviours most closely associated with intention. Further, mothers showed stability in these behaviour patterns across two sessions. A typology of mother style, based on the intentions of mothers to direct or converse with their children, is suggested and illustrated by individual cases.

Although cognitive precursors of language production have received considerable attention, the relationship of cognitive development to language comprehension development remains unexplored. In the present research, the relationship of object permanence and classification skills to receptive, as well as expressive, language development was investigated in infants between 0; 9 and 1; 3. Results indicated that object permanence, classification, and parent–child verbal interaction ratings were about equally related to language comprehension functioning. No prerequisite stage of object permanence functioning could be discerned. On the other hand, object permanence was more strongly related to language production than were classification and verbal interaction. Furthermore, it appeared that a minimum of Stage 5 object permanence functioning was necessary prior to the onset of language production.

This paper examines four mothers' responses to three object-related gestures (pointing, extending objects, and open-handed reaching) by their first-born infants from 0; 9 to 1; 6, and the impact of their responses on the children's transition from gestural to verbal communication. Analysis revealed that the mothers responded differentially to their children's pointing gestures, reciprocating to a greater degree with labels of the indicated objects. The children, in turn, produced more object-labelling words with pointing than with other gestures. In addition, the mothers' labelling responses to pointing significantly predicted the extent of their children's object-naming vocabularies.

The influence of phonological selection and avoidance upon early lexical acquisition was examined within an experimental paradigm. During 10 bi-weekly experimental sessions, 12 children (1;0.21 to 1;3.15 at the outset) were presented with 16 contrived lexical concepts, each consisting of a nonsense word and four unfamiliar referents. For each child, eight words involved phonological characteristics which had been evidenced in production (in) and eight had characteristics which had not been evidenced in production or selection (out), in words were produced imitatively and non-imitatively in greater numbers and in earlier sessions than OUT words, providing evidence for the influence of selection and avoidance. The degree of phonetic accuracy of these two types of productions did not differ. These findings are discussed in terms of a proposal concerning early phonological representation and acquisition.

Infants from a variety of linguistic backgrounds have been reported to babble similarly. The present study considers this possibility in detail, offering a concrete characterization of how babbling of Spanish- and English-learning babies is similar. Babbling of a group of Spanish- and another of English-learning infants (12 months of age) was recorded and transcribed by two experimenters, one a primarily Spanish speaker and one a primarily English speaker. Results show that in spite of gross phonetic differences between the adult phonologies of Spanish and English, babies from both groups produce predominantly CV syllables with voiceless, unaspirated plosive consonants. Vowel production is also perceived as notably alike. In the light of such similarities, possible differences in babbling of the two groups may be hard for even sophisticated listeners to notice.

Previous research has suggested that the syntactic and semantic characteristics of mother speech are determined by the underlying intention of mothers to control (Newport 1977) or to converse with (Snow 1977) the child. The present study attempts to delineate the structure among functionally categorized mother conversational behaviours, especially those which might reflect the mother's intention to control or converse with her child. The utterances of II mothers with their children (aged 2; 5–3; 0) were categorized according to their illocutionary force or function. Conversational parameters, such as topic change rate and talkativeness, were also measured. Intercorrelations among all these mother variables showed a polarized pattern, reflecting two predominant mother intentions for conversational interaction: the control of the child's physical actions, and the elicitation of his conversational participation. Implications of the findings, especially those indicating the incompatibility of controlling and conversation-eliciting intentions, are discussed.

Early in the development of language, children must learn to relate the language they hear to objects and events in their immediate perceptual environment. Gilmore (1977) found that infants at the two-word stage of language production and, under certain conditions, some infants at the one-word stage as well, seemed to map a simple sentence (e.g. The bunny hugs the kitty) onto a visual event (which, for example, showed a puppet rabbit hugging a puppet cat). In Gilmore's experiment, a habituation series of trials, presenting either appropriate pairings of a variety of sentences with visual events (as in the above example), or inappropriate pairings (e.g. The kitty hugs the bunny, when, in fact, the reverse was true) were presented repeatedly until subjects habituated. A test series of trials followed with an inappropriate/appropriate pairing, whichever was not used during habituation. Two-word subjects seemed to discriminate between the test and habituation pairings in either case. One-word subjects seemed to discrimi- nate only when they received the appropriate pairing during habituation and the inappropriate during the test.

Adjustments in speech made by 2- and 3-year-old children when talking to their 14-month-old siblings are described and compared with those made by mothers addressing their babies. ‘Clarification’ adjustments were made by all the children, but there were marked individual differences in the frequency of questions and ‘affective-expressive’ features – differences related to the quality of the relationship between the siblings. The pattern of speech adjustments reflected the social contexts in which the children addressed their siblings; within these contexts (prohibitory and playful) children as young as 2 make appropriate use of communicative devices. The individual differences between the children indicate two sources of influence on the adjustments made – pragmatic and emotional.

An investigation into the pronoun distribution of a pronoun-reversing child reveals inconsistencies both within production and between production and comprehension. This distribution is compatible with some analyses of normal pronoun development and pronoun reversal which have attributed non-adult person distinctions to the child. However, the data are also compatible with a quite distinct hypothesis which postulates that the child's pronouns are plurifunctional: the unreversed pronouns encode full adult distinctions, and are independent of the reversed pronouns, which function to shift perspective. The evaluation of these hypotheses and the questions they raise for normal and pathological pronoun development are discussed.

Children two to three years of age can spontaneously correct false statements and affirm true ones in a modified sentence verification paradigm. Such performances imply that very young children display knowledge of the rules of correspondence between language and reality (truth conditions) which are central to propositional logic, at an age when logical development in cognition has not been previously acknowledged.

Five hypotheses are explored about the role of REDUPLICATION in phonological development. Specifically, it was postulated that children who frequently reduplicate would (a) use more multisyllables, (b) be better at maintaining adult syllable structure, and (c) show limited ability at final consonant production. For all children, it was further proposed that reduplication would (d) be used predominantly as a means to maintain a nonreduplicated adult syllable, and (e) characterize the speech of the youngest subjects. Data were analysed for 24 children between 1; 1 and 2; 8, and compared when possible to results reported in Schwartz, Leonard, Wilcox & Folger (1980). The results confirmed the above hypotheses, revealing reduplication to be a general pattern during the earliest stages of phonological development that is used most frequently by children preferring to follow a multisyllabic rather than monosyllabic course of development.

Three experiments are reported which explored the conditions under which intra-word phonological variability occurs. Using an unsolicited imitation task, evidence of variability was obtained for words containing two or more phonological characteristics (consonants, word shapes) that were unstable in the child's speech, and for words containing both unstable characteristics and characteristics the child had not shown any evidence of producing with accuracy. Intra-word variability was most likely to occur when more than one aspect was in a state of instability or when one aspect was unstable and another was non-acquired. Words containing two phonological aspects not yet acquired by the child seemed to have little influence on variability. The findings indicate that variability can be attributed to (1) the presence of optional simplification processes, (2) the presence of more than one process applicable to a specific aspect of the word, (3) a competition between two aspects of the word for accurate surface realization, and/or (4) a competition between consonant approximation and word shape approximation.

Evidence provided by contrastive word order for agent and patient semantic categories in young children's spontaneous speech is confounded. Agents (effectors of the action) tend to be animate; patients (entities acted upon) tend to be inanimate. In an experiment designed to circumvent this confounding and to test young children's linguistic sensitivity to the role an entity plays in the action, nine children (2; 4·0–2; 11·5) described actions involving animate and inanimate entities playing both agent and patient roles. Four linguistic measures were observed. On every measure agents were treated differently from patients. For the most part, these agent–patient differences persisted when animate and inanimate entities were examined separately. These results provide evidence for the child's intention to talk about the role an entity plays, independent of its animateness, and also suggest that the child uses role-defined linguistic categories like AGENT and PATIENT to communicate these relational intentions.

The present paper is concerned with establishing the relative difficulty involved in the acquisition of the temporal conjunctions before and after. It tries to control the influence on performance of the following variables: contextual support within a sentence (logically/arbitrarily ordered sequences), order of mention, syntactic complexity, task requirement variables, and memory load. In addition, experiments intended to throw light on the cognitive mechanisms underlying an understanding of these conjuctions are described. The concept of time is supposed to be spatial in origin. An understanding of relative time is dependent on ability to decentre and coordinate. Finally, it is suggested that reversible thinking (in a Piagetian sense) is involved in the process of making inverse sentence order agree with event order.

Given the nature of Hebrew as a highly synthetic language with rich bound morphology, an attempt was made to establish a measure corresponding to the MLU for a language such as English. The method of calculating MPU (morpheme-per-utterance) which is described here was tried out on 38 Hebrew-speaking children aged 2;0 to 3;0, and measured for internal consistency against different types of elicitation procedures, and for validity by comparison with the subjects' performance on a specially-devised measure of syntactic–semantic development. The results clearly indicate that the MPU is a useful developmental index of the linguistic proficiency of two- to three-year-old Hebrew speakers. Implications of this finding for intra-linguistic and cross-linguistic evaluation are then discussed.

Thirty-six 2- to 3-year-old children were given linguistic and non-linguistic tasks in order to determine whether the words front and back introduce the concept of ‘front–back’ orientation or whether the concept precedes the words. Contrary to prediction, a complex disjunctive concept of ‘front–back’ orientation was found to precede any knowledge of the words front and back. Results of the linguistic task show that the word back is comprehended before front, and further that children at an intermediate state of lexical knowledge interpret front as if it means back.