Children with Autism Spectrum Disorders (ASD) have deficits in communication and delays in language development, but there have been few studies of their vocabulary. This study compared longitudinal parent report data from the MCDI collected for 49 children with ASD over three years with data from the MCDI norms. It focused on three aspects of lexical development: (1) change in lexical composition as evident in percentage of predicates/nominals; (2) order of emergence for predicate types and (3) predictive value of lexical variables for later grammatical development. ASD Groups were matched to typically developing group norms on total MCDI scores for each comparison. Subsequent analysis indicated: (1) no differences in the percentages of predicates/nominals for the two groups at 3 time points; and, (2) virtually identical orders of emergence for different predicate types with the exception of three meaning type categories—quantitative predicates, cognitive/affective predicates and predicates involving causal acts to change experiential states. Cognitive/affective predicates were found to come in somewhat later in ASD groups while quantitative predicates and predicates involving changes in experiential states came in earlier in ASD groups. This study also found (3) that lexical variables, especially number of predicates, strongly predicted grammatical complexity one year later, a process common in typical language development. The study concludes that lexical development in ASD follows the normal course, albeit later and more slowly. It also suggests that communication deficits in this population are rooted in challenges with social acts rather than from an inability to match meanings to words.

Children with Autism Spectrum Disorders (ASD) have deficits in communication and delays in language development, but there have been few studies of their vocabulary. This study compared longitudinal parent report data from the MCDI collected for 49 children with ASD over three years with data from the MCDI norms. It focused on three aspects of lexical development: (1) change in lexical composition as evident in percentage of predicates/nominals; (2) order of emergence for predicate types and (3) predictive value of lexical variables for later grammatical development. ASD Groups were matched to typically developing group norms on total MCDI scores for each comparison. Subsequent analysis indicated: (1) no differences in the percentages of predicates/nominals for the two groups at 3 time points; and, (2) virtually identical orders of emergence for different predicate types with the exception of three meaning type categories—quantitative predicates, cognitive/affective predicates and predicates involving causal acts to change experiential states. Cognitive/affective predicates were found to come in somewhat later in ASD groups while quantitative predicates and predicates involving changes in experiential states came in earlier in ASD groups. This study also found (3) that lexical variables, especially number of predicates, strongly predicted grammatical complexity one year later, a process common in typical language development. The study concludes that lexical development in ASD follows the normal course, albeit later and more slowly. It also suggests that communication deficits in this population are rooted in challenges with social acts rather than from an inability to match meanings to words.

Children with Autism Spectrum Disorders (ASD) have deficits in communication and delays in language development, but there have been few studies of their vocabulary. This study compared longitudinal parent report data from the MCDI collected for 49 children with ASD over three years with data from the MCDI norms. It focused on three aspects of lexical development: (1) change in lexical composition as evident in percentage of predicates/nominals; (2) order of emergence for predicate types and (3) predictive value of lexical variables for later grammatical development. ASD Groups were matched to typically developing group norms on total MCDI scores for each comparison. Subsequent analysis indicated: (1) no differences in the percentages of predicates/nominals for the two groups at 3 time points; and, (2) virtually identical orders of emergence for different predicate types with the exception of three meaning type categories—quantitative predicates, cognitive/affective predicates and predicates involving causal acts to change experiential states. Cognitive/affective predicates were found to come in somewhat later in ASD groups while quantitative predicates and predicates involving changes in experiential states came in earlier in ASD groups. This study also found (3) that lexical variables, especially number of predicates, strongly predicted grammatical complexity one year later, a process common in typical language development. The study concludes that lexical development in ASD follows the normal course, albeit later and more slowly. It also suggests that communication deficits in this population are rooted in challenges with social acts rather than from an inability to match meanings to words. / Medicine, Faculty of / Audiology and Speech Sciences, School of / Graduate

The purpose of this study was to compare early speech and language development of children with and without cleft lip and/or palate (CLP) in the US and Slovakia from 6 to 24 months of age. Thirty-two children from the US (eight with CLP and eight noncleft) and Slovakia (eight with CLP and eight noncleft) participated in this study. The children were videotaped at four time points for 30 minutes during mother-child interaction with play sets controlled for early-developing sounds in each language. Mean Babbling Level, consonant inventories, number of different words and mean length of utterance were calculated for 6-to 24-month samples. Results indicated that the US and Slovak groups showed similar performance across the ages. Cleft and noncleft groups showed significant differences in acquisition of all of the speech and language measures. High-pressure consonants, particularly alveolar place of articulation, were problematic for children with CLP.

The purpose of this study was to compare early speech and language development of children with and without cleft lip and/or palate (CLP) in the US and Slovakia from 6 to 24 months of age. Thirty-two children from the US (eight with CLP and eight noncleft) and Slovakia (eight with CLP and eight noncleft) participated in this study. The children were videotaped at four time points for 30 minutes during mother-child interaction with play sets controlled for early-developing sounds in each language. Mean Babbling Level, consonant inventories, number of different words and mean length of utterance were calculated for 6-to 24-month samples. Results indicated that the US and Slovak groups showed similar performance across the ages. Cleft and noncleft groups showed significant differences in acquisition of all of the speech and language measures. High-pressure consonants, particularly alveolar place of articulation, were problematic for children with CLP.

The growth of a child’s early vocabulary is one of the most salient indicators of progress in language development, but measuring a young child’s comprehension of words is non-trivial. Parental checklists are prone to underestimation of a child’s vocabulary (Houston-Price et al., 2007; Brady et al. 2014), so it may be that more direct measures, such as measuring a child’s eye movements during comprehension, may provide a better assessment of children’s vocabulary. Prior research has found relationships between gaze patterns and vocabulary development (Fernald et al. 2006), and the present exploratory study investigates these relationships with verbs, along with a number of methodological considerations. In addition, recent research supports the idea that verbs may differ in difficulty of acquisition based on word class, with manner verbs being easier to learn than result verbs (Horvath et al. 2015). The present study has two aims: 1) investigate the effect of dynamic stimuli on correlations with vocabulary scores and 2) experimentally investigate the notion that manner verbs are easier to learn than result verbs. Forty children (Mean age = 22.97 months) were recruited for participation and shown a vocabulary test. While no significant correlations were found between vocabulary measures and accuracy and latency, several experimental measures proved to be related to vocabulary development, including fixation density and length of first fixation to the non-target. Additionally, results indicate that children knew the same number of manner and result verbs. Finally, these results could inform vocabulary tests using eye-tracking measures that specifically target verb knowledge.

Our study investigated the processing of compound vocabulary of bilingual (BL) Mandarin-English children and their performance in comparison to monolingual (ML) English children. From this study, we sought to determine (a) how the BL children performed in Mandarin compared to English (b) how the BL children performed compared to the ML children, and (c) how background factors, such as language use and vocabulary size affect compound processing. We predicted that the BL children would show an advantage on compound processing tasks over the ML children due to the importance of compounding in word formation in Mandarin Chinese. In addition, we also used performance on picture vocabulary tasks as covariates to take into consideration potential differences in vocabulary size, as BL children often have a smaller vocabulary in each language because of distribution across languages. Data were collected from 25 BL Mandarin-English children (between 40 to 104 months of age) who were matched within three months to 25 ML English children (between 40 to 105 months of age). Children participated in a compound analogy task, in which they produced novel compounds after a model; and a compound knowledge task, in which they explained real compounds. Comparing performance across languages, results showed that the BL children demonstrated higher performance in the dominant language (English) than in the nondominant language (Mandarin). The BL children were more likely to accurately produce novel compounds, but also more likely to make errors that involved the use of compounds. No significant difference was found in BL and ML performance on compound knowledge tasks. Significant relationships were found for some of the participant characteristics for both the BL and ML children and performance. In particular, age, picture identification, and picture naming performance were correlated with compound performance for the BL participants; performance on the picture identification task and compound processing tasks were correlated with each other for the ML participants. These findings provided limited support for our hypothesis. Future investigations should include BL participants who have a more balanced proficiency in both languages, as well as examine factors that were found to influence ease of compound processing. / text

This study explored relationships between vocabulary size and self-regulation and joint engagement in 28 children with multi-system developmental delay (DD) aged 2;5 (years;months) to 5;6 and a language age-matched control group of 28 typically developing (TD) children aged 0;7 to 5;6 drawn from a larger sample of 77. Parents completed the ABASII, Second Edition (ABASII; Harrison & Oakland, 2003), with the Leisure, Self-direction, and Social subtests serving as measures of self-regulation and joint engagement. Vocabulary size was measured using an adaptation of the New Zealand version of the MacArthur Communicative Development Inventory: Toddlers (CDI; Reese & Read, 2000). Responses to the Language Use Inventory (O'Neill, 2007) were also collected for comparison with the CDI. Group differences on vocabulary size and the ABASII Social and Self-direction subtests were not significant. However, children with multi-system DD scored significantly higher on the Leisure subtest. Data from the children with multi-system DD revealed a medium, positive correlation between the CDI total score and the raw score of the Leisure subtest, r = 0.34, p = 0.075 and for the TD children a strong, positive correlation r = 0.51, p = 0.006. For the children with multi-system DD, there was a medium, positive correlation between the CDI total score and the raw score of the Self-direction subtest, r = 0.39, p = 0.038 and a strong, positive correlation for the TD children, r = 0.52, p = 0.005. Similarly, for the children with multi-system DD there was a medium, positive correlation between the CDI total score and the raw score of the Social subtest, r = 0.41, p = 0.032 and a strong, positive correlation for the TD children, r = 0.63, p < 0.001. The results suggest a positive correlation between self-regulation and joint engagement and vocabulary development in both groups of children.

Monolingual children identify referents uniquely in gesture before they do so with words, and parents translate these gestures into words. Children benefit from these translations, acquiring the words their parents translated earlier than the ones that are not translated. Are bilingual children as likely as monolingual children to identify referents uniquely in gesture; and, if so, do parental translations have the same positive impact on the vocabulary development of bilingual children? Our results showed that the bilingual children—dominant in English or in Spanish—were as likely as monolingual children to identify referents uniquely in gesture. More important, the unique gestures, translated into words by the parents, were as likely to enter bilingual children’s speech, as it does for monolinguals—independent of language dominance. Our results suggest that parental response to child gesture plays as crucial of a role in the vocabulary development bilingual children as it does in monolinguals.

This applied dissertation was designed to describe the effects of using a computerized reading and vocabulary development program with struggling third-grade students in a low socio-economic school setting. Vocabulary knowledge is paramount to developing and understanding unknown or unfamiliar words. Many students struggle with comprehension due to their limited exposure of vocabulary words. Students who have a limited vocabulary are often poor readers and continue to be a part of the academic achievement gap. This achievement gap appears to continue throughout the student’s time in school. In an effort to lessen this achievement gap, the educational system is now incorporating computerized instructions as a means to increase student’s academic achievement. Several benefits of incorporating computerize instructions into the school’s daily curriculum can be seen in both reading comprehension and literacy skills. Computer assisted instructions or CAI are designed to fit the specific needs of students and to provide differentiated activities that will further supplement the instructions in the classrooms. Computers are being used to present activities that are more interesting thereby motivating the students to become active learners who are also actively engaged in the learning process. The computers and the computer programs that are being implemented into the school systems are beginning to become an integral part in the daily curriculum of the schools. Using technology is just another way to provide students with opportunities to improve in the areas of vocabulary, reading, writing and their listening skills.