ABSTRACT
OBJECTIVE: Compare if localization of sounds and words discrimination in reverberant environment is different between children with dyslexia and controls. METHOD: We studied 30 children with dyslexia and 30 controls. Sound and word localization and discrimination was studied in five angles from left to right auditory fields (-90o, -45o, 0o, +45o, +90o), under reverberant and no-reverberant conditions; correct answers were compared. RESULTS: Spatial location of words in no-reverberant test was deficient in children with dyslexia at 0º and +90o. Spatial location for reverberant test was altered in children with dyslexia at all angles, except -90o. Word discrimination in no-reverberant test in children with dyslexia had a poor performance at left angles. In reverberant test, children with dyslexia exhibited deficiencies at -45o, -90o, and +45o angles. CONCLUSION: Children with dyslexia could had problems when have to locate sound, and discriminate words in extreme locations of the horizontal plane in classrooms with reverberation.
Subject(s)
Dyslexia/physiopathology , Sound Localization/physiology , Speech Perception/physiology , Acoustic Stimulation , Audiometry/methods , Auditory Threshold , Case-Control Studies , Child , Environment , Female , Humans , Male , Multivariate Analysis , Reference Values , Statistics, Nonparametric , Time Factors , Visual AcuityABSTRACT
Objective Compare if localization of sounds and words discrimination in reverberant environment is different between children with dyslexia and controls. Method We studied 30 children with dyslexia and 30 controls. Sound and word localization and discrimination was studied in five angles from left to right auditory fields (-90o, -45o, 0o, +45o, +90o), under reverberant and no-reverberant conditions; correct answers were compared. Results Spatial location of words in no-reverberant test was deficient in children with dyslexia at 0º and +90o. Spatial location for reverberant test was altered in children with dyslexia at all angles, except –-90o. Word discrimination in no-reverberant test in children with dyslexia had a poor performance at left angles. In reverberant test, children with dyslexia exhibited deficiencies at -45o, -90o, and +45o angles. Conclusion Children with dyslexia could had problems when have to locate sound, and discriminate words in extreme locations of the horizontal plane in classrooms with reverberation. .
Objetivo Comparar localización de sonidos y localización-discriminación de palabras bajo reverberación y sin reverberación en niños disléxicos y controles. Método Estudiamos 30 niños disléxicos y 30 controles, pareados por edad. La localización sonora y discriminación a palabras fue estudiada en cinco ángulos horizontales en los campos izquierdo y derecho (-90o, -45o, 0o, +45o, +90o), bajo reverberación y sin reverberación; las respuestas correctas fueron comparadas Resultados: La localización sonora sin reverberación fue deficiente en niños disléxicos a 0º y +90º. La localización bajo reverberación falló en niños disléxicos en todos los ángulos, excepto –-90o. Durante la discriminación a palabras, sin reverberación, los niños disléxicos fallaron en ángulos izquierdos. En la prueba reverberante, los niños disléxicos fallaron a -–45o, -90o y +45o. Conclusion Los niños con dislexia pueden tener problemas cuando tienen que localizar sonidos y discriminar palabras en las localizaciones extremas del plano horizontal en salones de clases típicos con reverberación. .
Subject(s)
Child , Female , Humans , Male , Dyslexia/physiopathology , Sound Localization/physiology , Speech Perception/physiology , Acoustic Stimulation , Auditory Threshold , Audiometry/methods , Case-Control Studies , Environment , Multivariate Analysis , Reference Values , Statistics, Nonparametric , Time Factors , Visual AcuityABSTRACT
Objetivo: Identificar las tendencias naturales de aciertos y calcular el punto de corte para 6 pruebas de procesos centrales de la audición (PCA): fusión binaural, palabra filtrada, dígitos dicóticos, patrones de frecuencia y patrones de duración y sonidos ambientales en el niño de 5, 7, 9 y 11 años de edad. Material y método: Se evaluaron 369 niños de la escuela pública urbana del Estado de Puebla con 6 pruebas de PCA, dos binaurales y 4 monoaurales; utilizando un audiómetro Madsen a 50dB SL re/umbral en 1 kHz, por medio de disco grabado en el Centro de Ciencias Aplicadas y Desarrollo Tecnológico de la Universidad Nacional Autónoma de México e Instituto Nacional de Rehabilitación. Resultados: Se determinaron los puntos de corte para las 6 pruebas incluidas y se determinó que tres pruebas son útiles. Adicionalmente los resultados obtenidos en niños de 11 años difirieron de los obtenidos en niños de menos de 11 años. Conclusión: Los resultados significan un avance en los criterios normativos en materia de las pruebas psicoacústicas para PCA en español y en un contexto socioeducativo frecuente en el país. Se requiere evaluar estos resultados frente a condiciones de trastornos en PCA (AU)
Objective: To identify the natural tendencies of hits and calculate the cut-off for a test group of central auditory processes (CAP): binaural fusion, filtered words, dichotic digits, frequency patterns and duration patterns, and ambient sounds in normal 5-, 7-, 9-, and 11-year-old children. Material and methods: We studied 369 children (738 ears) who attend public schools in Puebla City, administering 6 CAP tests (2 binaural and 4 monaural); we used an audiometer at 50dB SL re-threshold at 1kHz, from a CD recorded at the CCECADET-UNAM-INR (Centre for Applied Science and Technological Development at the National Autonomous University of Mexico and the National Institute for Rehabilitation). Results: We determined the cut-off points for the 6 tests. Conclusion: This information represents an advance in the normative standards in the field of psychoacoustic tests for CAP in Spanish and in the socio-educational context prevalent in Mexico. It is important to evaluate these results against CAP disorders (AU)
Subject(s)
Humans , Male , Female , Child , Psychoacoustics , Hearing Tests/methods , Hearing/physiology , Auditory Perception/physiology , Reference Values , Hearing Disorders/diagnosis , Auditory Diseases, Central/diagnosisABSTRACT
OBJECTIVE: To identify the natural tendencies of hits and calculate the cutoff for a test group of central auditory processes (CAP): binaural fusion, filtered words, dichotic digits, frequency patterns and duration patterns and ambient sounds in normal 5-, 7-, 9- and 11-year-old children. MATERIAL AND METHODS: We studied 369 children (738 ears) who attend public schools in Puebla City, administering 6 CAP tests (two binaural and four monaural); we used an audiometer at 50dB SL re-threshold at 1 kHz, from a CD recorded at the CCECADET-UNAM-INR (Centre for Applied Science and Technological Development at the National Autonomous University of Mexico and the National Institute for Rehabilitation). RESULTS: We determined the cutoff points for the six tests. CONCLUSION: This information represents an advance in the normative standards in the field of psychoacoustic tests for CAP in Spanish and in the socio-educational context prevalent in Mexico. It is important to evaluate these results against CAP disorders.
