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Review
. 2021 Jul-Aug;87(4):478-485.
doi: 10.1016/j.bjorl.2020.11.018. Epub 2021 Jan 5.

Dichotic sentence identification test in Portuguese: a study in young adults

Maristela Julio Costa  1 , Sinéia Neujahr Dos Santos  2 , Eliane Schochat  3
Affiliations
Review

Dichotic sentence identification test in Portuguese: a study in young adults

Maristela Julio Costa et al. Braz J Otorhinolaryngol. 2021 Jul-Aug.

Abstract

Introduction: Among the currently-applied auditory processing tests, dichotic listening tests have been widely used, since they allow investigating the hemispheric and inter-hemispheric function and their respective skills to process the received auditory information.

Objective: To obtain normality reference measures with the new dichotic sentence identification test in right-handed adults with normal hearing.

Methods: Quantitative, observational, cross-sectional study. 72 subjects were assessed, aged 19-44 years, right-handed, with normal hearing, without hearing complaints. The dichotic sentence identification test consists of different lists of sentences, which were combined two by two and presented at the same time, using earphones in both ears, at 50dB Sensation Level. The test was applied in four stages: training of the 3 stages, free attention, right and left directed attention, thus evaluating different auditory skills.

Results: In the free attention task, the average percentage of correct answers in the right ear was 93.59% and in the left ear 86.06%, with a statistically significant difference between the ears, with an advantage for the right ear. In the directed attention task, the average percentage of correct answers was 99.37% in the right ear and 98.8% in the left ear, with no statistical difference between the ears.

Conclusion: It is suggested, as a normality reference for the stage of free attention, 90%-100% for correct answers for the right ear and for the left ear, from 80% to 100%. When there is asymmetry between the ears, differences of up to 20% are expected, with an advantage for the right ear For the directed attention stage, the expected normality reference values ​​are 100% for the right ear and for the left ear, with no asymmetry between the ears; however, if it occurs, a difference of 10% is expected between the ears, with an advantage for the right ear.

Keywords: Auditory perception; Hearing disorders; Hearing tests.

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Figures

Figure 1
Figure 1
Minimum and maximum performances in the free attention task for the right ear (RE) and left ear (LE).
Figure 2
Figure 2
Performance frequency of normal-hearing young adults, in the free attention task, according to the cutoff points for the right (A) and left (B) ears.
Figure 3
Figure 3
Frequency of patients for the directed attention task according to the cutoff points for the right (A) and left (B) ears.
See this image and copyright information in PMC

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