Language evolution in children with cochlear implants

The capacity to incorporate significant words into the existing vocabulary and to use these words to form sentences with more mature syntactic structures emerges over a considerable time course in young deaf children who have undergone a cochlear implantation. The purpose of this follow-up study is to document the nature and time span of language production--in morphosyntactic and lexical skills--when a child's first experience with language sounds is provided artificially through electrical stimulation. To examine the development of these two aspects of linguistic processing, five deaf French children, all enrolled in similar postimplantation educational settings, were individually assessed at 6-month intervals over a period of 18 months. Computerized analyses were derived from their spontaneous speech in a 20-min standardized play session. Results for mean length of utterance and vocabulary revealed gradually improving performance for most children, in spite of the generally low starting point. Both measures of production nevertheless remained well below the norms established for normally hearing children. Although the achievement of higher production scores, which underlies more effective interpersonal exchanges, is evident after only 1 year of device use, it is clear that improvement does not always occur at the same pace, as shown by two of the children. This emphasizes the importance of longitudinal studies in documenting intersubject variability and intrasubject stability throughout the experience with an implant.     

A database for semantic, grammatical, and frequency properties of the first words acquired by Italian children.

The CFVlexvar.xls database includes imageability, frequency, and grammatical properties of the first words acquired by Italian children. For each of 519 words that are known by children 18-30 months of age (taken from Caselli & Casadio's, 1995, Italian version of the MacArthur Communicative Development Inventory), new values of imageability are provided and values for age of acquisition, child written frequency, and adult written and spoken frequency are included. In this article, correlations among the variables are discussed and the words are grouped into grammatical categories. The results show that words acquired early have imageable referents, are frequently used in the texts read and written by elementary school children, and are frequent in adult written and spoken language. Nouns are acquired earlier and are more imageable than both verbs and adjectives. The composition in grammatical categories of the child's first vocabulary reflects the composition of adult vocabulary. The full set of these norms can be downloaded from www.psychonomic.org/archive/.     

A database for semantic,grammatical, and frequency properties of the first words acquired by Italian children

The CFVlexvar.xls database includes imageability, frequency, and grammatical properties of the first words acquired by Italian children. For each of 519 words that are known by children 18–30 months of age (taken from Caselli & Casadio’s, 1995, Italian version of the MacArthur Communicative Development Inventory), new values of imageability are provided and values for age of acquisition, child written frequency, and adult written and spoken frequency are included. In this article, correlations among the variables are discussed and the words are grouped into grammatical categories. The results show that words acquired early have imageable referents, are frequently used in the texts read and written by elementary school children, and are frequent in adult written and spoken language. Nouns are acquired earlier and are more imageable than both verbs and adjectives. The composition in grammatical categories of the child’s first vocabulary reflects the composition of adult vocabulary. The full set of these norms can be downloaded fromwww.psychonomic.org/archive/.     

A cross-linguistic study of early lexical development

Cross-linguistic studies have shown that children can vary markedly in rate, style, and sequence of grammatical development, within and across natural languages. It is less clear whether there are robust cross-linguistic differences in early lexical development, with particular reference to the onset and rate of growth in major lexical categories (e.g., nouns, verbs, adjectives and grammatical function words). In this study, we present parental report data on the first stages of expressive and receptive lexical development for 659 English infants and 195 Italian infants between 8 and 16 months of age. Although there are powerful structural differences between English and Italian that could affect the order in which nouns and verbs are acquired, no differences were observed between these languages in the emergence and growth of lexical categories. In both languages, children begin with words that are difficult to classify in adult part-of-speech categories (i.e., “routines”). This is followed by a period of sustained growth in the proportion of vocabulary contributed by common nouns. Verbs, adjectives, and grammatical function words are extremely rare until children have vocabularies of at least 100 words. The same sequences are observed in production and comprehension, although verbs are reported earlier for receptive vocabulary. Our results are compared with other reports in the literature, with special reference to recent claims regarding the early emergence of verbs in Korean.     

Communicative development in Swedish children 16-28 months old: the Swedish early communicative development inventory--words and sentences

To describe the development of words and sentences in Swedish children 16-28 months old, 900 parental reports on 336 children were analyzed. Subjects were randomly selected from the national birth register, and there was a response rate of 88%. The assessments were made using the Swedish Early Communicative Development Inventory--words and sentences (SECDI--w&s). Age-based norms for productive vocabulary, pragmatic skills, grammar skills, and maximum length of utterance (MaxLU) were determined. We describe the development of feedback morphemes, semantic categories, and single words and tasks. Correlation across measures was significant, and especially strong between vocabulary size and grammar skills. Optimized positive predictive values were high for 25 to 28 month predictions (71%-88%), and vocabulary scores were found to be of particular predictive importance. No significant gender differences were detected. The clinical relevance of the instrument is discussed.     

Maternal communicative functions and mind-mindedness at 16 months as predictors of children’s internal and non-internal language at 20 months

The effects of Communicative functions and Mind-Mindedness on children’s language development have been typically investigated in separate studies. The present longitudinal research was therefore designed to yield new insight into the simultaneous impact of these two dimensions of maternal responsiveness on the acquisition of expressive language skills in a sample of 25 mother-child dyads. The frequencies of five communicative functions (Tutorial, Didactic, Conversational, Control and Asynchronous) and two types of mind-related comments (attuned vs. non-attuned) were assessed from a 15-min play session at 16 months. Children’s expressive language was examined at both 16 months (number of word types and tokens produced, and number of words attributed to the child in the Questionnaire for Communication and Early Language development) and 20 months (number of internal and non-internal words attributed to the child in the Italian version of the Mac Arthur-Bates Communicative Development Inventory). The main finding was that mothers’ use of attuned mind-related comments at 16 months predicted internal state language at 20 months, above and beyond the effects of CFs and children’s linguistic ability at 16 months; in addition, mothers’ Tutorial function at 16 months marginally predicted non-internal state language at 20 months, after controlling for MM and children’s linguistic ability at 16 months. These results suggest that different expressions of maternal responsiveness influence distinct aspects of children’s expressive language in the second year of life, although the effects of MM appear to be more robust.     

Why early linguistic milestones are delayed in children with Williams syndrome: late onset of hand banging as a possible rate–limiting constraint on the emergence of canonical babbling

In the present study, eight children with Williams syndrome were observed every 2 weeks between 6 months and 30 months of age when interacting with their mothers. When the collected data were transcribed in terms of both linguistic and motor activities, overall delay was found in terms of the onset of canonical babbling, first words, as well as various motor milestones in every child. The degree to which acquisition of each of the milestones was delayed was individually variable. Nevertheless, the onset of hand banging was found to be an indicator that predicted the onset of canonical babbling consistently among the children. Once canonical babbling was produced, moreover, the onset of first words was recorded during a following 2 to 3 month period. These findings appear to indicate the possibility that development of the motor ability to perform such rhythmic motor activity as hand banging acted as a control parameter for production of canonical syllables in the children.     

La demande prélinguistique et linguistique: qu'apporte le langage?

This study deals with the adjustment of requests to the communication situation at two stages of development: the end of the prelinguistic period (18 months) and the beginning of the linguistic period (30 months). The main objective is to point out how language acquisition introduces new modalities of adjustment. The production of two groups of 12 children (18 and 30 months) were compared in three situations of object requesting: (a) the adult complies with the request (satisfaction), (b) the adult asks a clarification question (clarification), (c) the adult refuses to comply with the request (refusal). The similarities observed suggest a continuity between the two ages with respect to the functional aspects of requests. As for the structural aspects, the results reveal a partial continuity between the prelinguistic children (18 months) and the linguistic children (30 months): at the age of 18 months, children use vocalizations as they use words at 30 months and gestures are used similarly at both ages. The differences observed between both age groups suggest that, at the age of 30 months, language is used in order to find a solution to the request situation, yet without any major changes in the communicative strategies. The results of this study relativize the revolution brought about by language in the child's behaviours and specify its contribution to the adjustment of messages as a function of the communication situation.     

Children in the public eye: The functioning of Pastors' children

Pastors' children have been thought to have more behavioral problems than other children since they face high expectations and are part of families that are often under public scrutiny. The purpose of this study was to describe the social competencies and behavioral problems of a national sample of pastors' children, aged 4–16, and to compare them to age and sex standardized norms. Data were obtained on 98 children from a random sample of 62 families, using the Child Behavior Checklist. Results indicate that scores for both boys and girls at each age grouping fell within the acceptable norms for both social competencies and behavioral problems.     

词汇飞跃: 早期语言发展的里程碑──来自五名汉语儿童的跟踪报告

本文通过对五名汉语儿童的长期跟踪调查,旨在从词汇增长、句法出现和语义发展三方面发掘词汇飞跃时期儿童的语言特征。结果显示：儿童在18个月左右词汇迅猛增长,出现词汇飞跃现象;标志句法出现的词语组合和词汇飞跃在时间上紧密相连;词汇飞跃期儿童语义发展显著,体现为过度延伸词的逐渐减少及下位层次词的逐渐增加。词汇飞跃是汉语儿童早期语言发展的里程碑,表明其在词汇、句法和语义多个语言层面的飞跃。     

Portuguese category norms for children

This study presents Portuguese category norms for children of three different age groups: preschoolers (3- to 4-year-olds), second graders (7- to 8-year-olds), and preadolescents (11- to 12-year-olds). Three hundred Portuguese children (100 in each group) completed an exemplar-generation task. Preschoolers generated exemplars for 13 categories, second graders generated exemplars for 17 categories, and preadolescents generated exemplars for 21 categories. For each group, responses within each category were organized according to frequency of production in order to derive exemplar-production norms for sets of tested categories. The results also included information about the number of responses and exemplars, idiosyncratic and inappropriate responses, and commonality and diversity indexes for all the categories. A comparison of these children's norms with the Portuguese adult norms was also presented. The full set of norms may be downloaded from www.psychonomic.org/archive.     

Tapping into the interplay of lexical and number knowledge using fast mapping: A longitudinal eye-tracking study with two-year-olds

Language skills and mathematical competencies are argued to influence each other during development. While a relation between the development of vocabulary size and mathematical skills is already documented in the literature, this study further examines how children’s ability to map a novel word to an unknown object as well as their ability to retain this word from memory may be related to their knowledge of number words. Twenty-five children were tested longitudinally (at 30 and at 36 months of age) using an eye-tracking-based fast mapping task, the Give-a-Number task, and standardized measures of vocabulary. The results reveal that children’s ability to create and retain a mental representation of a novel word was related to number knowledge at 30 months, but not at 36 months while vocabulary size correlated with number knowledge only at 36 months. These results show that even specific mapping processes are initially related to the acquisition of number words and they speak for a parallelism between the development of lexical and number-concept knowledge despite their semantic and syntactic differences.     

Neurophysiological markers of early language acquisition: from syllables to sentences

Recently, there have been several reports of the neurophysiological correlates of language acquisition. These indicate that the infant's brain is able to discriminate different phonemes within the first 2 months of life, that knowledge about stress patterns and phonotactic rules is established between 5-12 months, and that phonotactic knowledge begins to interact with lexical-semantic processes between 12-14 months. Electrophysiological markers for lexical-semantic processes indicate that semantic processing of words in picture contexts is present at 14 months and for words in sentential contexts around 30 months. At 32 months, children demonstrate an adult-like electrophysiological response pattern to syntactic violations. The similarities between the brain response patterns observed in children and adults support the view that language develops in a continuous manner.     

Children’s emotional norms for 600 French words

The present study provides a French child database containing a large corpus of words (N=600) that were rated on emotional valence (positive, neutral, and negative) by French children differing in both age (5, 7, and 9 years old) and sex (girls and boys). Good response reliability was observed in each of the three age groups. The results showed some age differences in the children’s ratings. With increasing age, the percentage of words rated positive decreased, whereas the percentage of neutral words increased and the percentage of negative words remained stable. Our study did not reveal marked differences across sex groups. The database compiled here should become a useful tool for experimental studies in which verbal material is used with children. It would be worthwhile in future research to study how children process emotional words and also to control the emotional variable in the same way as other linguistic variables in the experimental design. The norms from this study may be downloaded from brm.psychonomic-journals.org/content/supplemental.     

References to Mental States in Mother–Child Conversation in the Second Year of Life

Research into social influences on young children’s growing understanding of others’ inner states has highlighted the value of early conversational exchanges. This longitudinal study was aimed at investigating whether and how mothers changed their inner state words when children were 16 months olds (T1) and 4 months later (T2), and the children’ s ability to use references to mental states at 20 months. Overall language measures (e.g. number of words, mean length utterances) and internal state labels were analyzed during play interactions at T1 and T2 for the mothers, and at T2 for the children. Results highlighted that the mothers partially modified their mentalistic vocabulary over 4 months. Moreover, the use of maternal references directed to the other at T1 is linked to the children’s ability to use references with a commentary function at T2. Conversation with the caregivers during daily activity may constitute, for children, a key practice to enhance their metarepresentation skills.     

PERCEPTION DE FORMES GÉOMÉTRIQUES ET d'ILLUSIONS CHEZ DES ENFANTS FRANCAIS ET AMÉRICAINS1

Perception of geometric forms and optical illusions in French and American children. — A 30-item series of perceptual problems involving geometric forms and optical illusions was administered to 357 French and 732 American children, ages 8 through 16 years. A developmental gradient was observed in both samples: performance correlated +.33 with age in the French sample and +.22 in the American. Age-by-age comparison of means gave approximately identical results, except at age 12 where the French children scored significantly higher. Prior research has shown the perceptual series to be uncorrelated with verbal and linguistic ability, but significantly related to performance on tasks (such as the embedded figures test) which reflect analytic capacity. These findings, plus the cross-national stability of age norms and developmental gradients found here, suggest that the series may have value as a research tool for cross-cultural study of interpersonal effectiveness and analytic aptitude.     

The role of words and sounds in infants' visual processing: from overshadowing to attentional tuning

Although it is well documented that language plays an important role in cognitive development, there are different views concerning the mechanisms underlying these effects. Some argue that even early in development, effects of words stem from top-down knowledge, whereas others argue that these effects stem from auditory input affecting attention allocated to visual input. Previous research (e.g., Robinson & Sloutsky, 2004a ) demonstrated that non-speech sounds attenuate processing of corresponding visual input at 8, 12, and 16 months of age, whereas the current study demonstrates that words attenuate visual processing at 10 months but not at 16 months (Experiment 1). Furthermore, prefamiliarization with non-speech sounds (Experiment 2) resulted in able processing of visual input by 16-month-olds. These findings suggest that some effects of labels found early in development may stem from familiarity with human speech. The possibility of general-auditory factors underlying the effects of words on cognitive development is discussed.     

Evaluation of communicative and linguistic development using the Spanish version of the MacArthur-Bates inventories

The MacArthur-Bates Inventories are a valid and reliable method for assessing communicative and linguistic skills in infants (8-15 months) and young children (16-30 months), and have been adapted to many languages. This paper presents their adaptation to Spanish. Structure, innovations included in the Spanish version, and the standardisation process are described, and some results obtained from the analysis of a sample of 1150 children are presented. The advantages and limitations of the use of parental report inventories are highlighted. For children before three years of age, there are very few assessment tools of language and communicative development with sufficient guarantees produced and edited in Spain. The Spanish version of the MacArthur-Bates Inventories represents an important contribution for early identification of language delays or disorders, and for follow-up of these cases.