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Dichotic Consonant‐Vowel (CV) Perception in Normal and Learning‐Impaired Children

 

作者: Ross Roeser,   Kathleen Millay,   Juanita Morrow,  

 

期刊: Ear and Hearing  (OVID Available online 1983)
卷期: Volume 4, issue 6  

页码: 293-299

 

ISSN:0196-0202

 

年代: 1983

 

出版商: OVID

 

数据来源: OVID

 

摘要:

Two experiments were performed using dichotic presentation of the consonant-vowel (CV) syllables /pa/, /ba/, /ta/, /da/, /ka/, and /ga/. The stimuli were constructed with no temporal offsets between channels (±2 msec) and with temporal offsets of 30, 60, and 90 msec between channels. Data were analyzed for ear asymmetry (right ear advantage), doublecorrect responses (auditory capacity), and the effects of temporal offsets (the lag effect). In experiment 1, 32 normal children (mean age at entry = 6 yrs 6 mos) were evaluated once each year over a 4-yr period. Results showed no significant change in ear laterality over the 4 yrs. However, there was a significant, age-related increase in auditory capacity. None of the subject groups showed a significant lag effect. In experiment 2 results from 17 children (mean age = 9.3 yrs) enrolled in a school for learning disability who were identified as having significant auditory processing problems were compared to age- and sex-matched normal controls. Results failed to show a significant group difference for ear asymmetry, auditory capacity, or the lag effect. Case studies are presented comparing two learning-disabled children with two normal children matched for age and sex to illustrate the results for the learning-impaired population. Overall, findings indicate that the dichotic CV syllables test has limited prognostic value in identifying auditory processing dysfunction in children classified as having “learning disability.”

 

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