Three studies on the assessment and diagnosis of auditory processing disorders

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Mohsin Ahmed M. Shaikh (Creator)
The University of North Carolina at Greensboro (UNCG )
Web Site:
Denise Tucker

Abstract: Three studies on the assessment and diagnosis of Auditory Processing Disorder (APD) were conducted. The first study measured the failure rate of AP tests (speech and non-speech) and the APD diagnosis rate using four different diagnostic criteria. A retrospective analysis was conducted on test scores of 117 individuals with suspected APD. Failure rate was 3 to 4 times higher on the speech tests than the non-speech tests and consequently, there was a decrease in the diagnosis rate of APD when non-speech tests were included. Based on these findings, it was recommended that test batteries used to diagnose APD should include at least one non-speech test. The second study questioned whether an adding 2 seconds to the response time in three AP tests would benefit both typically developing students and those with learning disabilities. Learning disabled (LD) and 12 typically developing (TD) children (24 and 12 children, respectively) were administered three AP tests, Dichotic Digits (DD), Duration Pattern Sequence (DPS), and Random Gap Detection (RGD), under standard and extended time conditions. Students with LD improved significantly on the DD and DPS tests in the extended time condition. These findings indicate that adding 2 seconds to response time will significantly reduce the rate of APD diagnosis in students with LD. The third study investigated whether children with suspected APD are normally distributed between 1 and 2 standard deviations (SDs) below the mean. Retrospective analysis of AP assessments of 98 children did in fact show a normal distribution. Analysis revealed that the measured difference in the sample was not significantly different from the expected difference of 13.59% between 1 and 2SD. Consistent with AAA and ASHA guidelines, performance below 2 SD on at least two tests should be used to diagnose APD.

Additional Information

Language: English
Date: 2015
APD, Assessment, Auditory Processing, Diagnosis, Diagnostic Criteria, Non-Speech Test
Word deafness in children
Hearing disorders in children $x Diagnosis
Auditory perception in children $x Testing

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