Are “dichotic” deficits uniquely dichotic? Investigating dichotic performance with the Dichotic Digits difference Test (DDdT) in a large clinical population of children referred for an auditory processing assessment.

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Abstract

Background: Previous studies in a large population of typically-developing children and a small clinical group showed high correlations between the dichotic and diotic conditions of the Dichotic Digits difference Test (DDdT), as well as between DDdT performance and measures of memory and attention. Purpose: Investigate performance on the DDdT in a large clinical sample. Research Design: Correlational analysis between the DDdT diotic condition and the dichotic free recall (FR) right ear (RL), left ear (LE) and total (ear-averaged) conditions, as well as between DDdT and memory performance. Study Sample: One hundred and one children (6, 3 (yr, mo) to 15, 0, mean 9, 6) referred for assessment to the Australian Hearing Central Auditory Processing Disorder (CAPD) service. Results were compared to data from 112 typically developing children collected from previously published studies. Data Collection and Analysis: Z-scores were used to account for effect of age on performance. Mean differences between clinical and typically developing children were investigated using analysis of variance (ANOVA). Pearson product moment correlations determined the strength of relationships between DDdT conditions and the number memory forward (NMF) and reversed (NMR) subtests of the Test of Auditory Processing Skills – Third Edition (TAPS-3). Results: Performance by the clinical group on the DDdT dichotic FR (RE, LE and total) conditions was significantly correlated with the diotic condition (r = 0.7; 0.7, 0.8; p < 0.001). Significant correlations were found between the DDdT diotic and dichotic FR conditions and the NMF (r 0.5 to 0.6, p < 0.001) and NMR (r 0.2 to 0.5, p < 0. 025 to 0.001). ANOVA revealed no significant difference between the typically developing and clinical groups (p = 1.0000) in respect to the advantage they got from dichotic listening (calculated as dichotic FR total minus diotic score). Multiple regression revealed that diotic performance and short-term memory accounted for 68% of the variation in dichotic performance. Random measurement error accounted for a further 16%. Conclusions: Factors other than dichotic performance strongly impact a child’s ability to perform a dichotic digit listening task. This result has wide-spread implications in respect to interpretation of CAPD test results.
LanguageEnglish
JournalJournal of the American Academy of Audiology
Publication statusAccepted/In press - 27 Jun 2019

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Ear
Language Development Disorders
Population
Analysis of Variance
Aptitude
Short-Term Memory
Hearing
Research Design

Keywords

  • dichotic
  • diotic
  • auditory processing disorder

Cite this

@article{9712d04e8ef24abfae6cb87500d88d06,
title = "Are “dichotic” deficits uniquely dichotic? Investigating dichotic performance with the Dichotic Digits difference Test (DDdT) in a large clinical population of children referred for an auditory processing assessment.",
abstract = "Background: Previous studies in a large population of typically-developing children and a small clinical group showed high correlations between the dichotic and diotic conditions of the Dichotic Digits difference Test (DDdT), as well as between DDdT performance and measures of memory and attention. Purpose: Investigate performance on the DDdT in a large clinical sample. Research Design: Correlational analysis between the DDdT diotic condition and the dichotic free recall (FR) right ear (RL), left ear (LE) and total (ear-averaged) conditions, as well as between DDdT and memory performance. Study Sample: One hundred and one children (6, 3 (yr, mo) to 15, 0, mean 9, 6) referred for assessment to the Australian Hearing Central Auditory Processing Disorder (CAPD) service. Results were compared to data from 112 typically developing children collected from previously published studies. Data Collection and Analysis: Z-scores were used to account for effect of age on performance. Mean differences between clinical and typically developing children were investigated using analysis of variance (ANOVA). Pearson product moment correlations determined the strength of relationships between DDdT conditions and the number memory forward (NMF) and reversed (NMR) subtests of the Test of Auditory Processing Skills – Third Edition (TAPS-3). Results: Performance by the clinical group on the DDdT dichotic FR (RE, LE and total) conditions was significantly correlated with the diotic condition (r = 0.7; 0.7, 0.8; p < 0.001). Significant correlations were found between the DDdT diotic and dichotic FR conditions and the NMF (r 0.5 to 0.6, p < 0.001) and NMR (r 0.2 to 0.5, p < 0. 025 to 0.001). ANOVA revealed no significant difference between the typically developing and clinical groups (p = 1.0000) in respect to the advantage they got from dichotic listening (calculated as dichotic FR total minus diotic score). Multiple regression revealed that diotic performance and short-term memory accounted for 68{\%} of the variation in dichotic performance. Random measurement error accounted for a further 16{\%}. Conclusions: Factors other than dichotic performance strongly impact a child’s ability to perform a dichotic digit listening task. This result has wide-spread implications in respect to interpretation of CAPD test results.",
keywords = "dichotic, diotic, auditory processing disorder",
author = "Sharon Cameron and Harvey Dillon",
year = "2019",
month = "6",
day = "27",
language = "English",
journal = "Journal of the American Academy of Audiology",
issn = "1050-0545",
publisher = "American Academy of Audiology",

}

TY - JOUR

T1 - Are “dichotic” deficits uniquely dichotic? Investigating dichotic performance with the Dichotic Digits difference Test (DDdT) in a large clinical population of children referred for an auditory processing assessment.

AU - Cameron,Sharon

AU - Dillon,Harvey

PY - 2019/6/27

Y1 - 2019/6/27

N2 - Background: Previous studies in a large population of typically-developing children and a small clinical group showed high correlations between the dichotic and diotic conditions of the Dichotic Digits difference Test (DDdT), as well as between DDdT performance and measures of memory and attention. Purpose: Investigate performance on the DDdT in a large clinical sample. Research Design: Correlational analysis between the DDdT diotic condition and the dichotic free recall (FR) right ear (RL), left ear (LE) and total (ear-averaged) conditions, as well as between DDdT and memory performance. Study Sample: One hundred and one children (6, 3 (yr, mo) to 15, 0, mean 9, 6) referred for assessment to the Australian Hearing Central Auditory Processing Disorder (CAPD) service. Results were compared to data from 112 typically developing children collected from previously published studies. Data Collection and Analysis: Z-scores were used to account for effect of age on performance. Mean differences between clinical and typically developing children were investigated using analysis of variance (ANOVA). Pearson product moment correlations determined the strength of relationships between DDdT conditions and the number memory forward (NMF) and reversed (NMR) subtests of the Test of Auditory Processing Skills – Third Edition (TAPS-3). Results: Performance by the clinical group on the DDdT dichotic FR (RE, LE and total) conditions was significantly correlated with the diotic condition (r = 0.7; 0.7, 0.8; p < 0.001). Significant correlations were found between the DDdT diotic and dichotic FR conditions and the NMF (r 0.5 to 0.6, p < 0.001) and NMR (r 0.2 to 0.5, p < 0. 025 to 0.001). ANOVA revealed no significant difference between the typically developing and clinical groups (p = 1.0000) in respect to the advantage they got from dichotic listening (calculated as dichotic FR total minus diotic score). Multiple regression revealed that diotic performance and short-term memory accounted for 68% of the variation in dichotic performance. Random measurement error accounted for a further 16%. Conclusions: Factors other than dichotic performance strongly impact a child’s ability to perform a dichotic digit listening task. This result has wide-spread implications in respect to interpretation of CAPD test results.

AB - Background: Previous studies in a large population of typically-developing children and a small clinical group showed high correlations between the dichotic and diotic conditions of the Dichotic Digits difference Test (DDdT), as well as between DDdT performance and measures of memory and attention. Purpose: Investigate performance on the DDdT in a large clinical sample. Research Design: Correlational analysis between the DDdT diotic condition and the dichotic free recall (FR) right ear (RL), left ear (LE) and total (ear-averaged) conditions, as well as between DDdT and memory performance. Study Sample: One hundred and one children (6, 3 (yr, mo) to 15, 0, mean 9, 6) referred for assessment to the Australian Hearing Central Auditory Processing Disorder (CAPD) service. Results were compared to data from 112 typically developing children collected from previously published studies. Data Collection and Analysis: Z-scores were used to account for effect of age on performance. Mean differences between clinical and typically developing children were investigated using analysis of variance (ANOVA). Pearson product moment correlations determined the strength of relationships between DDdT conditions and the number memory forward (NMF) and reversed (NMR) subtests of the Test of Auditory Processing Skills – Third Edition (TAPS-3). Results: Performance by the clinical group on the DDdT dichotic FR (RE, LE and total) conditions was significantly correlated with the diotic condition (r = 0.7; 0.7, 0.8; p < 0.001). Significant correlations were found between the DDdT diotic and dichotic FR conditions and the NMF (r 0.5 to 0.6, p < 0.001) and NMR (r 0.2 to 0.5, p < 0. 025 to 0.001). ANOVA revealed no significant difference between the typically developing and clinical groups (p = 1.0000) in respect to the advantage they got from dichotic listening (calculated as dichotic FR total minus diotic score). Multiple regression revealed that diotic performance and short-term memory accounted for 68% of the variation in dichotic performance. Random measurement error accounted for a further 16%. Conclusions: Factors other than dichotic performance strongly impact a child’s ability to perform a dichotic digit listening task. This result has wide-spread implications in respect to interpretation of CAPD test results.

KW - dichotic

KW - diotic

KW - auditory processing disorder

M3 - Article

JO - Journal of the American Academy of Audiology

T2 - Journal of the American Academy of Audiology

JF - Journal of the American Academy of Audiology

SN - 1050-0545

ER -