J Am Acad Audiol 2019; 30(03): 169-177
DOI: 10.3766/jaaa.17048
Articles
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

The Impact of Tinnitus on N-Back Performance in Normal Hearing Individuals

Sebastian Waechter
*   Department of Logopedics, Phoniatrics and Audiology, Clinical Sciences Lund, Lund University, Lund, Sweden
,
Linda Hallendorf
*   Department of Logopedics, Phoniatrics and Audiology, Clinical Sciences Lund, Lund University, Lund, Sweden
,
Emelie Malmstein
*   Department of Logopedics, Phoniatrics and Audiology, Clinical Sciences Lund, Lund University, Lund, Sweden
,
Anna Olsson
*   Department of Logopedics, Phoniatrics and Audiology, Clinical Sciences Lund, Lund University, Lund, Sweden
,
K. Jonas Brännström
*   Department of Logopedics, Phoniatrics and Audiology, Clinical Sciences Lund, Lund University, Lund, Sweden
› Author Affiliations
Further Information

Publication History

Publication Date:
26 May 2020 (online)

Abstract

Background:

Tinnitus sufferers commonly report concentration difficulties. Despite several previous studies investigating this, the underlying cause and the role of hearing status remains unclear.

Purpose:

To investigate whether there are any differences between normal hearing individuals with and without tinnitus in terms of working memory capacity, and whether working memory capacity correlates with high-frequency hearing thresholds.

Research Design:

Participants had their hearing thresholds measured (0.125–16 kHz) and performed a visual n-back test. All participants completed the Hospital Anxiety and Depression Scale, in addition tinnitus participants filled out the Tinnitus Questionnaire.

Study Sample:

Sixty-two individuals participated, 31 had tinnitus (tinnitus group) and 31 did not have tinnitus (control group). Groups were age- and sex matched, and all participants had normal hearing thresholds (20 dB HL or better at 0.125–8 kHz).

Data Analysis:

Friedman test of differences among repeated measures was conducted on the collected data of n-back performance, and Mann–Whitney U-test was used to compare groups. Age-corrected correlations were calculated for high-frequency hearing and each n-back condition.

Results:

We found no significant differences between the groups in terms of n-back task performances, except for the 2-back condition where the tinnitus group performed significantly better than the controls (p = 0.007). Furthermore, we found high-frequency hearing thresholds of the best ear (10–16 kHz) to correlate with performances at more demanding n-back conditions (p = 0.029 for 1-back and p = 0.015 for 2-back).

Conclusion:

This suggests that presence of tinnitus might not imply poorer working memory capacity and that deteriorated high-frequency hearing thresholds.

This study was financially supported by Hörselskadades Riksförbund (HRF, the Swedish National Association for Hearing Impaired) and the Crafoord Foundation.


 
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