RESUMO
Abstract Studies have provided evidence that morphological awareness contributes to word reading in opaque languages such as English. However, this relationship is not yet established for Brazilian Portuguese, a much less opaque language. The present study performed a longitudinal investigation of the relationship between morphological awareness and word reading in 162 children from 2nd to 5th grades of elementary school. The children were evaluated in the final quarter of the respective school year (time 1) and 1 year later (time 2). Hierarchical regression analyses controlling for intelligence, phonological awareness, and phonological working memory were conducted. The hierarchical regression analyses were followed up by cross-lagged panel correlations, and both results converged to word reading measured in the 2nd and 3rd grades contributing to morphological awareness 1 year later. In addition, morphological awareness measured in the 4th grade contributed to word reading 1 year later. The greater transparency of Brazilian Portuguese may make morphological awareness less important for word reading in the early grades; however, in older children, morphological awareness is important for word reading performance.
RESUMO
O objetivo deste estudo foi verificar se existe diferença no desempenho de crianças com Transtorno do Desenvolvimento da Linguagem (TDL) e Desenvolvimento Típico de Linguagem (DTL) em testes de memória operacional fonológica (MOF) e de memória visual de curto prazo (MVCP), e se esse desem-penho está correlacionado com o vocabulário receptivo. Selecionamos 14 crianças com TDL e 28 com DTL. Todos os sujeitos foram submetidos a dois testes de memória de curto prazo e a um teste de vocabulário receptivo. A comparação entre os grupos foi realizada por meio do Teste t de Student e a correlação entre a memória de curto prazo e o vocabulário foi obtida pela correlação de Pearson. Crian-ças com TDL tiveram pior desempenho quando comparadas ao grupo controle, tanto em MOF quanto em MVCP. A correlação positiva entre os testes de memória e vocabulário sugere que tanto a alça fo-nológica quanto a memória visual são importantes para o processamento da linguagem, mesmo que a alça fonológica possa ter maior relevância
The aim of this study was to verify if there is a difference in performance between children with Developmental Language Disorder (DLD) and typical language development (TLD) in phonological working memory (PWM) test and visual short-term memory (VSTM), and if this performance is correlated with the result of a receptive vocabulary test. We selected 14 children with DLD and 28 with TLD. All subjects underwent two short-term memory tests and a receptive vocabulary test. The comparison between the groups was performed using the Student's t-test, and the correlation between the short-term memory and the vocabulary was obtained by Pearson's correlation. Children with DLD had a worse performance when compared with the control group, both in PWM and VSTM. The positive correlation between memory and vocabulary tests suggests that both the phonological loop and visual memory are important for the processing of language, even if the phonological loop may have greater relevance.
El objetivo de este estudio fue verificar si existe una diferencia en el desempeño de los niños con Trastorno del Desarrollo del Lenguaje (TDL) y el desarrollo del lenguaje típico (DLT) en las pruebas de memoria operativa fonológica (MOF) y memoria visual a corto plazo (MVCP), y si ese desempeño es correlacionado con el vocabulario receptivo. Seleccionamos 14 niños con TDL y 28 con DTL. Todos los sujetos se sometieron a dos pruebas de memoria a corto plazo y a una prueba de vocabulario receptivo. La comparación entre grupos se realizó mediante la prueba t de Student y la correlación entre la memoria a corto plazo y el vocabulario se obtuvo mediante la correlación de Pearson. Los niños con TDL tuvieron un peor desempeño en comparación con el grupo de control, tanto en la MOF como en la MVCP. La correlación positiva entre las pruebas de memoria y vocabulario sugiere que tanto el bucle fonológico como la memoria visual son importantes para el procesamiento del lenguaje, aunque el bucle fonológico puede tener mayor relevancia.
Assuntos
Humanos , Masculino , Feminino , Vocabulário , Criança , Cognição , Transtornos do Desenvolvimento da Linguagem , Memória de Curto Prazo , Crescimento e Desenvolvimento , Testes de LinguagemRESUMO
O presente estudo avaliou, por meio da modelagem de equação estrutural, a estrutura fatorial subjacente às medidas de consciência fonológica, memória de trabalho fonológica e nomeação seriada rápida, tendo em vista o conflito na literatura no que se refere à natureza das tarefas de nomeação seriada rápida. Foram comparados modelos compatíveis com a proposta de que as tarefas de consciência fonológica, memória fonológica e nomeação seriada rápida avaliam o processamento fonológico e modelos compatíveis com a proposta de que tarefas de nomeação seriada rápida não avaliam o processamento fonológico. Os resultados desse estudo oferecem suporte à hipótese de que a nomeação seriada rápida não é uma medida do processamento fonológico.
Considering a conflict in literature regarding the nature of rapid automatized naming tasks, this study evaluated the factor structure underlying the measures of phonological awareness, phonological working memory and rapid automatized naming tasks using the method of structural equation modeling (SEM). Models compatible with the proposal that the tasks of phonological awareness, phonological working memory and rapid automatized naming assess phonological processing, and models compatible with the proposal that rapid automatized naming tasks do not assess phonological processing were compared. The results of this study support the hypothesis that rapid automatized naming tasks are not measures of phonological processing.
Assuntos
Humanos , Masculino , Feminino , Criança , Memória de Curto Prazo , Fonética , Psicometria , Leitura , EstudantesRESUMO
Background noise may impose deleterious effects on cognitive processing. However, noise below the threshold level may increase the ability to detect stimuli via stochastic resonance mechanisms (SR). The present study investigates whether task performance is deteriorated or enhanced by 5-dB SNR and, if the task performance is enhanced, whether this facilitation in performance points to a particular neural area that serves to attenuate noise and/or increase effective task performance. The areas of interest are the cerebellum and hippocampus due to their roles in working memory (WM) and their links with attention. Fifteen healthy young Malay adults performed three tasks during fMRI scanning: listening to babble noise (N), WM task in quiet (WMQ), and WM task in noise (WMN). Activated regions during N are bilateral STG and MTG. Both WM tasks produced similar activation in a network of areas in the frontal, temporal and parietal lobes. However, the two tasks demonstrated marked differences in the left hippocampus, right posterior cerebellum, and bilateral anterior cerebellum. Moreover, the results obtained from the behavioral task demonstrated that participants responded better in the presence of noise. These results support the hypothesis that the left hippocampus, right posterior cerebellum, and bilateral anterior cerebellum may be involved in attenuating noise and/or increasing attention to task performance, which could be due to SR mechanisms operating in the presence of noise. These results collectively suggest leftward asymmetries during the tasks with the right posterior cerebellum, bilateral anterior cerebellum, and left hippocampus providing compensatory attention processes, at least in the context of this study.
Assuntos
Cognição , Hipocampo , Memória de Curto Prazo , Efeitos do Ruído , Imageamento por Ressonância Magnética/métodos , Processos EstocásticosRESUMO
O presente estudo investigou se as variáveis 'processamento fonológico' (memória de trabalho fonológica e consciência fonológica), 'nomeação seriada rápida' e 'consciência morfológica' contribuem de forma independente umas das outras para a leitura e a escrita no português brasileiro, após o controle da idade e da inteligência não verbal. Participaram da pesquisa 94 crianças matriculadas na 3ª série (quarto ano) do ensino fundamental de três escolas particulares. Os resultados de análises de regressão hierárquica indicaram que o processamento fonológico, a nomeação seriada rápida e a consciência morfológica apresentaram contribuições independentes para a habilidade de escrita. Porém, no que diz respeito à precisão e à fluência de leitura, apenas o processamento fonológico e a nomeação seriada rápida contribuíram para essas habilidades.
The purpose of this study was to evaluate the independent contribution of phonological processing (phonological awareness and phonological working memory), rapid naming and morphological awareness to reading and writing skills in Brazilian Portuguese. Ninety-four third-graders of three private Brazilian schools took part in this study. Hierarchical regression analyses were carried out on measures of reading (accuracy and fluency) and writing skills controlling for age and intelligence. The results showed an independent contribution of phonological processing, rapid naming and morphological awareness for writing skill. However, the results for measures of reading accuracy and reading fluency indicated that only phonological processing and rapid naming made independent contributions for such skills.