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Auditory and visual influences on phonemic restoration.
Language and Speech
|April 1, 1990
Summary
This study investigated how acoustic features and vision affect phonemic restoration. Voiceless consonants and certain consonant places were more restorable, while vision reduced response bias for intact speech sounds.
Area of Science:
- Cognitive Psychology
- Auditory Perception
- Speech Science
Background:
- Phonemic restoration, the perception of a missing speech sound, is influenced by acoustic properties and contextual information.
- Understanding the factors affecting phonemic restoration is crucial for models of speech perception.
Purpose of the Study:
- To investigate the influence of acoustic correlates of voicing and place of articulation on phonemic restoration.
- To examine the effect of phonotactic constraints on phonemic restoration.
- To determine the impact of auditory-visual conditions on phonemic restoration.
Main Methods:
- Utilized Samuel's (1981a) psychophysical paradigm to study phonemic restoration.
- Measured phonemic restoration (d') and response bias (Beta) under varying acoustic conditions.
- Compared auditory-only versus auditory-visual presentation of stimuli.
Main Results:
- Acoustic features significantly impacted phonemic restoration: voiceless stops were more restorable than voiced stops.
- Alveolar stops showed less restoration compared to bilabial and velar stops.
- Visual information reduced the bias to perceive stimuli as intact, suggesting a modulation of response bias.
Conclusions:
- Findings support interactive-activation models of speech perception, integrating top-down and bottom-up processes.
- Acoustic properties of speech sounds play a critical role in phonemic restoration.
- Visual input can influence response bias in phonemic restoration tasks.