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Correlation Between Binaural Summation Measured via Acoustic Reflex Thresholds and Psychoacoustic Masking Level Difference (PD102515)

Presenter(s): Vishakha W Rawool, PhD; Chelsea Campbell, AuD
Course Description

This session analyzed the correlation between the binaural summation measured via acoustic reflex thresholds and the results of the masking level difference established for 500 Hz in 60 participants. The Pearson Correlation Analyses between the MLD values and the binaural summation revealed a significant (r= 0.277; p = 0.032) correlation when the probe stimulus was presented to the right ear and the reflex evoking clicks were presented to the left ear. Although the correlation is significant, the effect size is small, suggesting that each measure may provide information about both similar and different aspects of binaural processing and can be included in a battery of auditory processing disorders (APD) tests.

This course is a recorded technical research session from the 2021 ASHA Convention Virtual Library (session 4719V).

Content Disclosure: The authors used one specific tool to obtain the acoustic reflex thresholds.

Learning Outcomes
You will be able to:

  • Describe the procedure for measuring binaural summation using acoustic reflex thresholds
  • Compare the objective procedure for measuring binaural summation using acoustic reflex thresholds with the psychoacoustic procedure called Masking Level Difference for measuring binaural processing
  • Evaluate the correlation between the results of binaural summation via acoustic reflex threshold procedure and the Masking Level Difference procedure

Content Disclosure

The authors used one specific tool to obtain the acoustic reflex thresholds.

Presenter Information

Vishakha Rawool, PhD, CCC-A, CPS/A, FRSM, F-AAA (Presenting Author), is Chair & Professor in the Department of Communication Sciences & Disorders at the University of Mississippi and an author of two widely used textbooks, Hearing Conservation in Occupational, Recreational, Educational, and Home Settings and Auditory Processing Deficits: Assessment and Intervention, published by Thieme. She is a highly experienced clinician with numerous funded research publications and has served as an expert guest speaker at national and international conferences.

Financial Disclosures:

  • Employed by the University of Mississippi
  • Royalties from Thieme for Auditory Processing Deficits: Assessment and Intervention
  • This project is partially funded by the Grace Clements Communication Sciences & Disorders Research Endowment Award at West Virginia University

Nonfinancial Disclosures:

  • ASHA member
  • Committee member of the American Auditory Society

Chelsea Campbell, AuD (Nonpresenting Author) is an audiologist at Allegany Hearing & Balance Center in Farmington, Pennsylvania.

Financial Disclosures:

  • No financial relationships relevant to the content of the session

Nonfinancial Disclosures:

  • No nonfinancial relationships relevant to the content of the session

Assessment Type

Self-assessment—Think about what you learned and report on the Completion Form how you will use your new knowledge.

To earn continuing education credit, you must complete the learning assessment by March 9, 2028.

Program History and CE Information

Content origination date: November 2021
End date: March 9, 2028

Subscribers Ratings
PDH: 0.5
ASHA CEU*: 0.05
Item #(s): PD102515
Available Through: March 09, 2028