This paper explores the concurrent and predictive validity of the long and short forms of the Galician version of the MacArthur-Bates CDI (IDHC). Forty-two Galician-speaking children were longitudinally evaluated at age 1 ; 6, 2 ; 0 and 4 ; 0. On the first two occasions, the subjects' vocabulary and grammar skills were assessed through the IDHC. Simultaneously, lexical and grammatical measures were obtained from spontaneous speech samples. Standardized measures of general cognitive abilities (WPPSI-R) and receptive and expressive language (RDLS-III) were obtained at age 4 ; 0. Results showed high and significant levels of concurrent and short-term validity of the IDHC. Strong associations were found between lexical development at age 2 ; 0 and language scores two years later. These results coincide with those obtained with other CDI versions, and suggest that the IDHC is an effective and reliable tool.
This work aims to analyse the specific contribution of social abilities (here considered as the capacity for attributing knowledge to others) in a particular communicative context. 74 normally developing children (aged 3;4 to 5;9, M=4·6) were given two Theory of Mind (ToM) tasks, which are considered to assess increasing complexity levels of epistemic state attribution: Attribution of knowledge-ignorance (Pillow, 1989; adapted by Welch-Ross, 1997) and Understanding of False-belief (Baron Cohen, Leslie & Frith, 1985). Subjects were paired according to their age and level of performance in ToM tasks. These dyads participated in a referential communication task specially designed for this research. The resulting communicative interchanges were analysed using a three-level category system (pragmatic functions, descriptive accuracy, and ambiguity of messages). The results showed significant differences among subjects with different levels of social comprehension regarding the type of communicative resources used by them in every category level. In particular, understanding of false belief seems to be the most powerful predictor of changes in the children’s development of communicative competence.
Comunicativas: IDHC). La forma del Nivel I está dirigida a padres de niños pequeños entre los 8 y los 15 meses de edad. La forma del Nivel II está dirigida a padres de niños entre 16 y 30 meses. Se han aplicado a 1150 padres: 357 formularios del Nivel I y 806 del Nivel II. Se proporcionan los datos normativos para cada grupo de edad, así como los análisis de las variables demográficas sobre las puntuaciones obtenidas. La fiabilidad y validez halladas indican que la versión abreviada del IDHC presenta muy buenas características psicométricas, y correlaciones muy elevadas con la versión completa del IDHC.Los resultados obtenidos para el Nivel I indican la existencia de una disociación entre producción de vocabulario y comprensión de vocabulario, con la producción claramente por detrás de la comprensión. Se encontraron importantes diferencias individuales, pero no efectos de género a lo largo de este período.En el Nivel II se observa una importante progresión en las puntuaciones del vocabulario producido con importantes variaciones individuales. Las correlaciones entre las puntuaciones en vocabulario y en gramática (combinación de palabras y LME3) fueron altas, lo que da apoyo a la hipótesis de la masa léxica. Si bien se han hallado diferencias de género y de orden de nacimiento, sin embargo sus efectos han sido bastante reducidos. Se concluye que la versión reducida del IDHC constituye un útil y conveniente instrumento para la evaluación rápida del desarrollo del lenguaje. Palabras clave: Escala MacArthur-Bates, evaluación del lenguaje, desarrollo del lenguaje, desarrollo léxico, desarrollo gramatical, fiabilidad, validez concurrente, cuestionarios paternos, gallego.
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