Absence of ear advantage for segmental and tonal perception in noise

2017 ◽  
Vol 141 (5) ◽  
pp. 4032-4032
Author(s):  
Feng Gu ◽  
Themis Kwong ◽  
Lena Wong
Keyword(s):  
Tonal Perception ◽  
Ear Advantage

scholarly journals “The Dichotic Digit Test” as an Index Indicator for Hearing Problem in Dementia: Systematic Review and Meta-Analysis

2020 ◽  
Author(s):  
Nattawan Utoomprurkporn ◽  
Chris J.D. Hardy ◽  
Joshua Stott ◽  
Sergi G. Costafreda ◽  
Jason Warren ◽  
...  
Keyword(s):  
Systematic Review ◽  
Cognitive Impairment ◽  
Speech Processing ◽  
Test Performance ◽  
Meta Analysis ◽  
Control Group ◽  
People With Dementia ◽  
Ear Advantage ◽  
Right Ear Advantage ◽  
Dementia Onset

Abstract Background Patients with dementia commonly have problems processing speech in the presence of competing background speech or noise. This difficulty can be present from the very early stages of dementia, and may be a preclinical feature of Alzheimer's disease. Purpose This study investigates whether people with dementia perform worse on the dichotic digit test (DDT), an experimental probe of speech processing in the presence of competing speech, and whether test performance may predict dementia onset. Research Design Systematic review and meta-analysis. Data Collection and Analysis A literature search was conducted in Medline, Embase, Scopus, and Psycinfo. We included (1) studies that included people with a diagnosis of dementia and a healthy control group with no cognitive impairment; (2) studies that reported results from a DDT in a free-recall response task; and (3) studies that had the dichotic digit mean correct percentage score or right-ear advantage, as outcome measurements. Results People with dementia had a lower DDT total score, with a pooled mean difference of 18.6% (95% confidence interval [CI]: 21.2–15.9). Patients with dementia had an increased right-ear advantage relative to controls with a pooled difference of 24.4% (95% CI: 21.8–27.0). Conclusion The DDT total scores are lower and the right-ear advantage increased in cognitively impaired versus normal control participants. The findings also suggest that the reduction of dichotic digit total score and increase of right-ear advantage progress as cognitive impairment increases. Whether abnormalities in dichotic digit scores could predict subsequent dementia onset should be examined in further longitudinal studies.

Ear advantage in dichotic listening after correction for early congenital hearing loss

1998 ◽  
Vol 36 (3) ◽  
pp. 209-216 ◽  
Author(s):  
Joshua I. Breier ◽  
Merrill Hiscock ◽  
Robert A. Jahrsdoerfer ◽  
Lincoln Gray
Keyword(s):  
Hearing Loss ◽  
Dichotic Listening ◽  
Congenital Hearing Loss ◽  
Ear Advantage

Planum temporale asymmetry and ear advantage in dichotic listening in developmental dyslexia and Attention-Deficit/Hyperactivity Disorder (ADHD)

2002 ◽  
Vol 8 (1) ◽  
pp. 22-36 ◽  
Author(s):  
LORI M. FOSTER ◽  
GEORGE W. HYND ◽  
ALLISON E. MORGAN ◽  
KENNETH HUGDAHL
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Normal Control ◽  
Developmental Dyslexia ◽  
Attention Deficit ◽  
Dichotic Listening ◽  
Planum Temporale ◽  
Hyperactivity Disorder ◽  
Ear Advantage ◽  
Right Ear Advantage ◽  
Auditory Association Cortex

The planum temporale is clearly involved in language processing, for it serves as the auditory association cortex. Research has consistently demonstrated that 60 to 70% of the population has leftward asymmetry of the planum temporale. Research has also suggested that dyslexic individuals tend to have either rightward asymmetry or symmetrical plana. Moreover, many studies have found a relationship between the presence of dyslexia and/or language impairment and deficits in the normal right ear advantage found in dichotic listening paradigms. In this context, this study examined the relationship between planum temporale asymmetry and ear preference in dichotic listening performance in children with Developmental Dyslexia and Attention-Deficit/Hyperactivity Disorder (ADHD). Subjects included 19 children with dyslexia (10 of whom had a comorbid diagnosis of ADHD), 23 children with ADHD, and 12 diagnosed normal control children. Dichotic listening data were not collected for 8 of the 12 normal control children and for 3 of the 23 ADHD children. Results revealed no significant difference between ADHD and dyslexic subjects in regard to ear advantage on the free recall dichotic listening task. In addition, although the directed dichotic listening tasks were not related to degree of planum asymmetry, as predicted, results indicated that subjects who consistently displayed an atypical left ear advantage tended to have larger right bank lengths than those who consistently displayed a typical right ear advantage. These findings support the notion that some individuals with dyslexia or language deficits tend to have a larger right planum temporale and that performance on dichotic listening tasks may reflect this relatively unusual pattern. (JINS, 2002, 8, 22–36.)

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