On the Emergence of Phonological Knowledge and on Motor Planning and Motor Programming in a Developmental Model of Speech Production.

A broad sketch for a model of speech production is outlined which describes developmental aspects of its cognitive-linguistic and sensorimotor components. A description of the emergence of phonological knowledge is a central point in our model sketch. It will be shown that the phonological form level emerges during speech acquisition and becomes an important representation at the interface between cognitive-linguistic and sensorimotor processes. Motor planning as well as motor programming are defined as separate processes in our model sketch and it will be shown that both processes revert to the phonological information. Two computational simulation experiments based on quantitative implementations (simulation models) are undertaken to show proof of principle of key ideas of the model sketch: (i) the emergence of phonological information over developmental stages, (ii) the adaptation process for generating new motor programs, and (iii) the importance of various forms of phonological representation in that process. Based on the ideas developed within our sketch of a production model and its quantitative spell-out within the simulation models, motor planning can be defined here as the process of identifying a succession of executable chunks from a currently activated phoneme sequence and of coding them as raw gesture scores. Motor programming can be defined as the process of building up the complete set of motor commands by specifying all gestures in detail (fully specified gesture score including temporal relations). This full specification of gesture scores is achieved in our model by adapting motor information from phonologically similar syllables (adapting approach) or by assembling motor programs from sub-syllabic units (assembling approach).

The Influence of Form- and Meaning-Based Predictions on Cortical Speech Processing Under Challenging Listening Conditions: A MEG Study.

Under adverse listening conditions, prior linguistic knowledge about the form (i.e., phonology) and meaning (i.e., semantics) help us to predict what an interlocutor is about to say. Previous research has shown that accurate predictions of incoming speech increase speech intelligibility, and that semantic predictions enhance the perceptual clarity of degraded speech even when exact phonological predictions are possible. In addition, working memory (WM) is thought to have specific influence over anticipatory mechanisms by actively maintaining and updating the relevance of predicted vs. unpredicted speech inputs. However, the relative impact on speech processing of deviations from expectations related to form and meaning is incompletely understood. Here, we use MEG to investigate the cortical temporal processing of deviations from the expected form and meaning of final words during sentence processing. Our overall aim was to observe how deviations from the expected form and meaning modulate cortical speech processing under adverse listening conditions and investigate the degree to which this is associated with WM capacity. Results indicated that different types of deviations are processed differently in the auditory N400 and Mismatch Negativity (MMN) components. In particular, MMN was sensitive to the type of deviation (form or meaning) whereas the N400 was sensitive to the magnitude of the deviation rather than its type. WM capacity was associated with the ability to process phonological incoming information and semantic integration.

An exploration of the relationship between phonological and phonics knowledge, and self-efficacy for teaching.

The purpose of the present study was to survey trainee teachers to find out if there was a relationship between phonological and phonics content knowledge, perceived proficiency in this knowledge, and feelings of self-efficacy as teachers. Participants were 51 undergraduate international teacher trainees from Malaysia studying in a 4-year university program to teach English as another language. They completed a phonological and phonics knowledge survey as well as a short questionnaire relating to self-efficacy for teaching. The survey results showed, similar to previous studies of the linguistic knowledge of teachers and teacher trainees, difficulties with phonological and phonics knowledge. Students who thought they were proficient in phonological and phonics knowledge were higher in phonological knowledge but not in phonics scores than were students who thought they were less proficient. The results for teaching self-efficacy showed that students with higher phonological knowledge had higher levels of external teaching self-efficacy in that they tended to disagree that factors outside their control made it difficult for some pupils to succeed. This suggests that higher levels of phonological knowledge gives prospective teachers more self-belief in their ability to help all their pupils.

El desarrollo de la escritura de palabras en español: Interacción entre el conocimiento fonológico y ortográfico / Spelling development in Spanish: Interaction between phonological and orthographic knowledge

El presente trabajo se propone ampliar los conocimientos acerca de las estrategias léxicas y fonológicas que utilizan los niños en la tarea de escritura de palabras en español, durante los primeros años de escolaridad. Para ello se analizó en dos experimentos, cómo incidían las variables de complejidad, extensión y frecuencia, así como el conocimiento ortográfico en el aprendizaje temprano de la escritura. En el primer experimento la variable ortográfica no fue considerada de manera específica, por lo que se diseñó y aplicó un segundo experimento. En el experimento dos se evaluó la incidencia del conocimiento léxico al comparar la adquisición de correspondencias consistentes e inconsistentes, dependientes e independientes del contexto. Las pruebas de escritura de palabras se aplicaron al finalizar el primer año y segundo año de Enseñanza General Básica (EGB). En los resultados, a finales de primer año, no se encontró un efecto de frecuencia, pero se observó, en cambio, una fuerte incidencia de la complejidad y la longitud en el desempeño de los niños, lo que puso de manifiesto que los mecanismos fonológicos son fundamentales en la primera etapa de aprendizaje de la escritura. Asimismo, se advirtió que los mecanismos léxicos son relativamente tardíos y se adquieren gradualmente. Sólo a finales de segundo año se encontró una interacción entre los mecanismos fonológicos y léxicos. Las implicancias pedagógicas del estudio fueron también consideradas.

This study analyzed the acquisition of word spelling strategies in Spanish-speaking children, during the first two years of elementary education. The cognitive word spelling models, initially developed for English, describe different stages in the acquisition spelling process. In the first stage, children write by memory, reproducing visual cues. At a second stage, children analyze the phonological structure of the word. Finally, in an orthographic stage, children can write words, using lexical information, without phonological mediation (Frith, 1984, 1985; Marsh, Friedman, Welch & Desberg, 1980). Even when the stages theory was discussed, these first studies allowed the identification of early lexical strategies and phonological mechanisms implied in the English word spelling processes. However, English is a language with a deep orthography, and the phonological strategy is a necessary mechanism but it is not enough to spell words properly. On the contrary, the Spanish orthographic system is shallow, and the phonemes-graphemes correspondences are very regular. Consequently, the spelling strategies could be different in these two languages, and the models developed for English would partially explain the orthographic learning process in transparent languages. This work aims to contribute to the knowledge on early spelling word strategies in Spanish. In two experiments, first and second grade children were given spelling tests designed to explore their phonological and orthographic knowledge. In the first experiment, the incidence of word complexity, length and frequency on spelling performance was explored. However, there was a possibility that, if children performed better in frequent words spelling, in relation to less frequent, they were resorting to their lexical knowledge. In this case, children were using an orthographic-lexical strategy. On the other hand, the possibility of writing complex and long words is associated to the phonological awareness level and correspondence knowledge. If children were able to easily write frequent and non frequent short and simple words, but had difficulties in writing long and complex words, they were possibly analyzing the sounds of the words and thus activating the corresponding letters. If the word was long or complex and the phonological skills were not well developed, children would have difficulties in writing them; one such problem, for example, would be in omitting letters. In this case, complexity and length variables that show the use of an analytic strategy would be influencing the performance. In the first experiment, the orthographic variable was not considered specifically, so a second experiment was designed. The second experiment evaluated orthographic knowledge, considering the orthographic characteristics of the words. The acquisition of the consistent and inconsistent correspondences was compared. The consistent correspondences could be solved using transcription rules, while inconsistent correspondences could be written only through lexical knowledge. Furthermore, consistent correspondences could be independent or dependent from context. In the first case, we refer to phonemes that are always represented with the same letter. In the other case, transcription depends on the syllabic context. Tests were applied at the end of the first and the second year of primary education. Results of the first experiment showed that, at the end of the first year, there was no frequency effect but the variables of complexity and length affected the children's performance. At the end of the second year, a frequency effect and a significant interaction between complexity and frequency were found. In the second experiment, a significant consistence effect was observed, but there was no frequency effect. These results indicate that phonological strategies are fundamental in the beginning of spelling acquisition. On the contrary, lexical mechanisms appear later and they are acquired gradually. Indeed, at the end of the first grade, frequency only affected performance of context dependent correspondences, but not independent. Likewise, interaction between phonological and lexical strategies was found only at the end of the second year. Pedagogical implications were also considered.