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Perceptual Asymmetries and Auditory Processing of Estonian Quantities
Liis Kask1,2, Nele Põldver1, Pärtel Lippus3
1Institute of Psychology, University of Tartu, Tartu, Estonia.
Frontiers in Human Neuroscience
|May 17, 2021
Summary
Auditory perceptual asymmetry shows that longer duration stimuli are more easily detected than shorter ones, with native language influencing this perception. Pitch changes did not significantly affect auditory discrimination.
Area of Science:
- Neuroscience
- Psycholinguistics
- Auditory Perception
Background:
- Auditory perception exhibits a
- pop-out
- effect, known as auditory perceptual asymmetry, where distinct features enhance detection.
- Linguistic stimuli meaning can depend on combinations of duration and pitch, as seen in Estonian's quantity system.
Purpose of the Study:
- To investigate auditory perceptual asymmetry in linguistic stimuli based on duration and pitch.
- To compare the brain's automatic processing of phonological features influenced by native language.
Main Methods:
- Mismatch negativity (MMN) experiment using synthesized Estonian words with varied vowel duration and pitch contours.
- Stimuli manipulation included two durations (170 ms, 290 ms) and two pitch contours (level, falling).
- Participants included native Russian and Estonian speakers, with data analyzed using GAMM and ANOVA.
Main Results:
- A longer duration deviant elicited a greater MMN amplitude compared to a shorter deviant among longer standards.
- Changes in pitch contour (falling vs. level) did not produce significant MMN or asymmetry.
- Perception of linguistic stimuli differed based on native language, indicating interference with early automatic processing.
Conclusions:
- Language background significantly affects asymmetric perception of linguistic stimuli.
- Auditory perceptual asymmetry is demonstrated, with duration playing a more critical role than pitch contour in this study.
- Findings support the influence of native language on early, automatic auditory processing of phonological features.
Keywords:
auditory perceptual asymmetryduration changelanguage processingmismatch negativitypitch changequantity stimulispeech perceptionMore Related Videos
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