Previous research on young children's knowledge of prosodic focus marking has revealed an apparent paradox, with comprehension appearing to lag behind production. Comprehension of prosodic focus is difficult to study experimentally due to its subtle and ambiguous contribution to pragmatic meaning. We designed a novel comprehension task, which revealed that three- to six-year-old children show adult-like comprehension of the prosodic marking of subject and object focus. Our findings thus support the view that production does not precede comprehension in the acquisition of focus. We tested participants speaking English, German, and French. All three languages allow prosodic subject and object focus marking, but use additional syntactic marking to varying degrees (English: dispreferred; German: possible; French preferred). French participants produced fewer subject marked responses than English participants. We found no other cross-linguistic differences. Participants interpreted prosodic focus marking similarly and in an adult-like fashion in all three languages.

Establishing local coherence relations is central to text comprehension. Positive-causal coherence relations link a cause and its consequence, whereas negative-causal coherence relations add a contrastive meaning (negation) to the causal link. According to the cumulative cognitive complexity approach, negative-causal coherence relations are cognitively more complex than positive-causal ones. Therefore, they require greater cognitive effort during text comprehension and are acquired later in language development. The present cross-sectional study tested these predictions for German primary school children from Grades 1 to 4 and adults in reading and listening comprehension. Accuracy data in a semantic verification task support the predictions of the cumulative cognitive complexity approach. Negative-causal coherence relations are cognitively more demanding than positive-causal ones. Moreover, our findings indicate that children's comprehension of negative-causal coherence relations continues to develop throughout the course of primary school. Findings are discussed with respect to the generalizability of the cumulative cognitive complexity approach to German.

The effect of an adult–child discourse structure on children's production of word combinations was examined. Seventeen children at the singleword utterance level (1; 5–2; 1) served as subjects. An experimental group of six children were engaged in vertical structures over 10 sessions, while the remaining children served as a control group. Pre-tests and post-tests revealed a significant difference in the number of spontaneous and elicited multiword productions for the experimental group, but no difference for the control group.

Astington (1988) found that seven- to nine-year-olds often fail to distinguish between promises and predictions when judging the utterances of characters in simple stories. Instead, these children attend only to the outcome of the story (i.e. whether the promised event occurred) when deciding whether a promise has been made and, to a lesser extent, when deciding whether the speaker is responsible for the outcome. The purpose of the present study was to examine whether seven- to nine-year-olds (a) vary their judgements of responsibility according to the reason that the promised action was not completed, and (b) recognize that an unfulfilled promise is a promise regardless of whether the speaker's failure is unavoidable or intentional. Seven-year-olds, nine-year-olds, and adults were asked to make promise and responsibility judgements for two story types: stories in which the promiser intentionally failed to fulfil his or her promise and stories in which an unforeseen event prevented the promiser from fulfilling the promise. Participants at all ages assigned responsibility correctly across both story types. In making promise judgements, however, the seven-year-olds' decisions about promises reflected a misguided attention to the outcome of a promise or the obstacle to its fulfilment. The nine-year-olds recognized that an unfulfilled promise is a promise but only when there was a clear reason for the speaker's failure to fulfil his or her obligation. We suggest that children consider only sincere promises to be instances of promising and make inferences about speaker sincerity by looking to external factors in the communicative context.

A perceptual study was conducted in order to determine (I) whether a group of mothers could recognize their own infant on the basis of tape-recorded cry samples obtained under three cry-evoking situations, and (2) whether an infant's sex could be correctly identified simply by listening to cry samples. The results of this study indicated that mothers could recognize the cry of their own infant with few instances of confusion and that the sex of an unknown infant cannot be reliably identified using a simple auditory identification paradigm.

Two construals of agency are evaluated as possible innate biases guiding case-marking in children. A BROAD construal treats agentive arguments of multi-participant and single-participant events as being similar. A NARROWER construal is restricted to agents of multi-participant events. In Hindi, ergative case-marking is associated with agentive participants of multi-participant, perfective actions. Children relying on a broad or narrow construal of agent are predicted to overextend ergative case-marking to agentive participants of transitive imperfective actions and/or intransitive actions. Longitudinal data from three children acquiring Hindi (1;7 to 3;9) reveal no overextension errors, suggesting early sensitivity to distributional patterns in the input.

Three Canadian–English infants and three Parisian–French infants were filmed bi-weekly for three to five months, from the age of 0;9 or 0;11 until 1;2, at home in naturalistic interaction with a parent. Their babbled utterances were transcribed phonetically and categorized according to consonant-type and vowel-type. The contexts for each utterance were described in terms of both specific and more general contextual categories. Observed frequencies of co-occurrences between phonetic and contextual categories were compared to expected frequencies, and deviations were considered to be patterns in babbling. Patterning increased after age 1;0 for most infants, and from 15% to 30% of each infant's babbled utterances recurred in particular contexts with a greater-than-expected frequency. Similarities in patterns were found both within and across language groups. These sound-meaning correspondences in babbling are viewed as continuous with early situation-bound meaning in words.

The early development of vocalic and consonantal production in Mandarin-learning infants was studied at the transition from babbling to producing first words. Spontaneous vocalizations were recorded for 24 infants grouped by age: G1 (0 ; 7 to 1 ; 0) and G2 (1 ; 1 to 1 ; 6). Additionally, the infant-directed speech of 24 caregivers was recorded during natural infant–adult interactions to infer language-specific effects. Data were phonetically transcribed according to broad categories of vowels and consonants. Vocalic development, in comparison with reports for children of other linguistic environments, exhibited two universal patterns: the prominence of [ɛ] and [ə], and the predominance of low and mid vowels over high vowels. Language-specific patterns were also found, e.g. the early appearance and acquisition of low vowels [ɑ]. Vowel production was similar in G1 and G2, and a continuum of developmental changes brought infants' vocalization closer to the adult model. Consonantal development showed two universal patterns: labials and alveolars occurred more frequently than velars; and nasals developed earlier than fricatives, affricates and liquids. We also found two language-specific patterns: alveolars were more prominent than labials and affricates developed early. Universal and language-specific characteristics in G1 continued to be prominent in G2. These data indicate that infants are sensitive to the ambient language at an early age, and this sensitivity influences the nature of their vocalizations.

This study examines the development of word order patterns in Irish, a strict VSO language. It was found that the three children studied used subject-initial utterances considerably more frequently than adults in input, and that in both adult and child the elision of the verb ‘to be’ played a significant role. Another significant factor was found to be the different restrictions on main verbs and verbal nouns with regard to the subject: in neutral sentences the main verb always precedes the subject, while the verbal noun always follows it. The Bates & MacWhinney (1979). hypothesis that early verb initialization results from a tendency to place new information before given information was also investigated.

Three- and four-year-old children were asked predicate-focus questions (‘What's X doing?’) about a scene in which an agent performed an action on a patient. We varied: (i) whether (or not) the preceding discourse context, which established the patient as given information, was available for the questioner; and (ii) whether (or not) the patient was perceptually available to the questioner when she asked the question. The main finding in our study differs from those of previous studies since it suggests that children are sensitive to the perceptual context at an earlier age than they are to previous discourse context if they need to take the questioner's perspective into account. Our finding indicates that, while children are in principle sensitive to both factors, young children rely on perceptual availability when a conflict arises.

Two experiments tested whether Russian-speaking children with Developmental Language Disorder (DLD) are sensitive to gender agreement when performing a gender decision task. In Experiment 1, the presence of overt gender agreement between verbs and/or adjectival modifiers and postverbal subject nouns memory was varied. In Experiment 2, agreement violations were introduced and the targets varied between words, pseudo-words, or pseudo-words with derivational suffixes. In both experiments, children with DLD did not differ from typically developing children in their reaction time or sensitivity to agreement features. In both groups, trials with feminine gender resulted in a higher error rate. Children with DLD displayed lower overall accuracy, which was related to differences in phonological memory in both experiments. Furthermore, in Experiment 1 group differences were not maintained after phonological memory was entered as a covariate. The results are discussed with respect to various processing and linguistic theories of DLD.

Weak syllables in Germanic and Romance languages have been reported to be challenging for young children, with syllable omission and/or incomplete reduction persisting till age five. In Mandarin Chinese, neutral tone (T0) involves a weak syllable with varied pitch realizations across (preceding) tonal contexts and short duration. The present study examined how and when T0 was acquired by 108 Beijing Mandarin-speaking children (3–5 years) relative to 33 adult controls. Lexicalized (familiar) and non-lexicalized (unfamiliar) T0 words were elicited in different preceding tonal contexts. Unlike previous reports, the present study revealed that children as young as three years have already developed a phonological category for T0, exhibiting contextually conditioned tonal realizations of T0 for both familiar and unfamiliar items. However, mastery of adult-like pitch and duration implementation of T0 is a protracted process not completed until age five. The implications for the acquisition of weak syllables more generally are discussed.

Cross-cultural differences in book sharing practices of American and Thai mother-preschooler dyads were examined. Twenty-one Thai monolingual and 21 American-English monolingual mothers and their four-year-olds completed a book sharing task. Results revealed narrative style differences between the American and Thai groups: American mothers adopted a high-elaborative story-builder style and used affirmations, descriptions, extensions, and recasting more than Thai mothers. Thai mothers adopted a low-elaborative story-teller style and used more attention directives and expansions than American mothers. American children produced longer narratives than their Thai peers, whereas Thai children repeated their mothers’ utterances more than their American counterparts. Maternal and child narrative styles were associated. These results suggest that maternal scaffolding styles differ across cultures and influence children's developing narrative skills.

Word segmentation plays a crucial role in language acquisition, particularly for word learning and syntax development, and possibly predicts later language abilities. Previous studies have suggested that this ability develops differently across languages, possibly affected by the languages’ rhythmic properties (Rhythmic Segmentation Hypothesis) and target word location in the prosodic structure (Edge Hypothesis). The present study investigates early word segmentation in a language, European Portuguese, that exhibits both stress- and syllable-timed properties, as well as strong cues to both higher-level prosodic boundaries and the word level. Infants aged 4–10 months old were tested with target words located in utterance-medial and utterance-final positions. Evidence for word segmentation was found early in development but only for utterance-edge located target words, suggesting the more salient prosodic cues play a crucial role. There was some evidence for segmentation in utterance-medial position by 10 months, demonstrating that this ability is not yet fully developed, possibly due to mixed rhythmic properties.

Thirty children with a mean length of utterance ranging from 1·00 to 4 and an age range of 1; 7 to 5; 5 were tested by their own mothers for comprehension of two-noun possessive phrases such as mommy's shoe. Three types of possessive relationships (alienable, intrinsic and reciprocal) in addition to anomalous possessive phrases were used to uncover children's knowledge of the semantics and syntax of English possession. Results indicated, first, that even young children may have detailed notions of which objects are likely to serve as possessors and which as possessions, and second, that word order may not be used to comprehepossessive phrases until considerable linguistic development has occurred.

Four experiments examine the child's ability to draw on functional information to predict the similarity of function across exemplars and to extend new words from an initial exemplar to one of two others. Experiments 1 and 2 tested 16 three- and four-year-olds each (mean ages: 4;5 and 4;4, in Experiments 1 and 2, respectively) and reveal that three- and four-year-olds are able to predict similarity of function and to extend new words on the basis of function if the function is based on shape, but not if the function is based on material makeup. Experiment 3 tested 53 older children, at three age groups (mean ages: 7;2, 8;3, 9;10) and suggests that seven-year-olds have more difficulty in judging similarity of function on the basis of material makeup than eight- and nine-year-olds, and that nine-year-olds are more likely than seven- and eight-year-olds to use functional information to extend new words. Experiment 4 tested 108 children in two age groups (with mean ages of 7;9 and 9;8) and reveals that when function is pitted against syntax as criteria for categorization under a new name, seven-year-olds are more attentive to syntax than nine-year-olds, while nine-year-olds are more attentive to function than seven-year-olds. The cognitive difficulties associated with judgements concerning material function are discussed in relation to additional factors that could lead children under age nine to perform in a non-adult-like fashion in the extension of new names.

Global tendencies for the relative absence of covocalization (simul- taneous talk) have been identified in both conversations between adult partners and conversations between mothers and their infants; in each case, the alternating mode in which one partner speaks at a time is predominant. The present investigation examined the timing of the partners' talk in mother-infant engagements over infant age to determine whether: (a) variations occur in the incidence of the alternating mode; and (b) variations occur in the extent to which the alternating mode predominates. Conversations involving a total of 48 mothers and their infants aged from 0;3 to 2;0 were investigated at each of eight infant ages (0;3, 0;6, 0;9, 1;0, 153, 1;6, 1;9 and 2;0). The results indicated that, within a global tendency for the relative absence of covocalization, there was: (a) a curvilinear tendency for the incidence of covocalization to decrease over the first 18 months, and then to increase; and (b) a linear tendency for the extent to which the alternating mode predominates to increase over age. These changes are interpreted as reflecting the facilitative effects of covocalization in the case of young preverbal infants, and the need for the alternating, turn-taking pattern to predominate as mutual comprehension becomes possible in conversations between mothers and their older infants.

Recent research suggests that young children assume, as a default, that a word applied ostensively to an unfamiliar object (e.g. a man riding in a car) is a basic-level count noun (e.g. person) rather than a situation-restricted count noun (e.g. passenger). In this experiment, 14 mothers and their children (mean age 3;7; range 3;0 to 4;6) participated in a story-book reading session in which the mothers taught their children both a basic-level count noun and a situation-restricted count noun for a series of object drawings. An analysis of mothers' spontaneous teaching strategies revealed that, for a given object, they typically taught a basic-level count noun before a situation-restricted count noun. Furthermore, they tended to teach basic-level count nouns exclusively through estensive definition, especially when the objects were unfamiliar. Moreover, they were (1) more likely to use estensive definitions and (2) less likely to provide additional information concerning the application of the word, when teaching basic-level count nouns than when teaching situation-restricted count nouns. The results provide new evidence that word teachers, like young word learners, assume that a basic-level count noun is the psychologically-privileged candidate for an ostensive definition involving an (unfamiliar) object.

Responsive parental communication during an infant's first year has been positively associated with later language outcomes. This study explores responsivity in mother–infant communication by modeling how change in guiding language between 7 and 11 months influences toddler vocabulary development. In a group of 32 mother–child dyads, change in early maternal guiding language positively predicted child language outcomes measured at 18 and 24 months. In contrast, a number of other linguistic variables – including total utterances and non-guiding language – did not correlate with toddler vocabulary development, suggesting a critical role of responsive change in infant-directed communication. We further assessed whether maternal affect during early communication influenced toddler vocabulary outcomes, finding that dominant affect during early mother–infant communications correlated to lower child language outcomes. These findings provide evidence that responsive parenting should not only be assessed longitudinally, but unique contributions of language and affect should also be concurrently considered in future study.

Intuitive syllabifications of 50 five- and six- and 50 eight-year-old children are studied in an experimental setting. The children syllabified Dutch disyllabic words with a single intervocalic consonant that were presented orally to them. The aim was to find out if these syllabifications adhered to the universal principles of syllable structure and if the children's syllabifications witnessed an overruling of the universal phonological constraints by language specific ones. Results indicate that universal principles are sufficient to explain syllabifications. Except for obligatory onset formation, other principles act as soft constraints that are influenced by factors such as stress and vowel and consonant quality. A language specific constraint proposed in the phonological literature, namely bimoraic minimality, is hypothesized to be a result of children's familiarization with the spelling conventions.