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Discussion Paper

Identification of binaural integration deficits in children with the Competing Words Subtest: Standard score versus interaural asymmetry

Identificación del déficit de integración binaural en niños, utilizando la prueba competitiva con palabras: calificación estándar vs asimetría interaural

Pages 200-210 | Published online: 26 Aug 2009
 

Abstract

The Competing Words Subtest is a commonly used dichotic listening test for assessing binaural integration in children suspected of having an auditory processing disorder. In 124 children, standard scores from the subtest suggested a binaural integration deficit in 23% of the children tested. Because standard scores are derived from the combined scores of both ears during the test, children with normal performance in one ear and weak performance in the other ear may be overlooked. For these children, a measure of interaural asymmetry may be a more sensitive indicator of a binaural integration deficit. When an age-appropriate criterion for interaural asymmetry from the Competing Words Subtest was used, the incidence of a binaural integration deficit increased to 51% of the children tested. Four typical patterns of dichotic listening performance were identified based on results from the two scoring techniques.

Abbreviations
SCAN=

Screening Test for Auditory Processing Disorders

SCAN-C=

Test for Auditory Processing Disorders in Children – Revised

ASHA=

American Speech Language and Hearing Association

APD=

auditory processing disorder

PTA=

pure-tone average

SS=

standard score

IA=

interaural asymmetry

Abbreviations
SCAN=

Screening Test for Auditory Processing Disorders

SCAN-C=

Test for Auditory Processing Disorders in Children – Revised

ASHA=

American Speech Language and Hearing Association

APD=

auditory processing disorder

PTA=

pure-tone average

SS=

standard score

IA=

interaural asymmetry

Sumario

La prueba competitiva con palabras es una prueba dicótica comúnmente utilizada para evaluar integración binaural en niños en los que se sospechan alteraciones de procesamiento central. En una muestra de 124 niños las calificaciones estándar sugerían un déficit en la integración bianural del 23%. Debido a que las calificaciones estándar son derivadas de puntuaciones combinadas de ambos oídos, los niños con un desempeño normal en un oído y pobre en el otro, pueden pasar desapercibidos. La medición de la asimetría interaural para estos niños puede ser un indicador más sensible de un déficit de integración binaural. Cuando se utilizó un criterio apropiado, por edades para evaluar asimetría interaural de la prueba competitiva con palabras, la incidencia de asimetría en la integración binaural se elevó a un 51% en los niños evaluados. Con base en los resultados al utilizar las dos técnicas de calificación, se identificaron cuatro patrones de desempeño en las pruebas dicóticas.

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