Individual differences in perceptual adaptability of foreign sound categories

Area of Science:

• Psycholinguistics
• Auditory Perception
• Phonetics

Background:

• Listeners adapt to acoustic variability in speech, such as different accents.
• Native listeners adjust phonetic categorization based on cue distribution changes.
• Individual cue-weighting strategies influence adaptation patterns.

Purpose of the Study:

• To investigate if non-native listeners adapt phonetic categorization to altered acoustic cue distributions.
• To determine how individual cue-weighting strategies affect non-native listeners' adaptation.
• To compare non-native listener adaptation to native listener patterns.

Main Methods:

• Native English and Korean listeners participated.
• Participants were exposed to a noncanonical "accent" with conflicting acoustic cues (voice onset time and f0).
• Listener adaptation was analyzed in relation to initial cue-weighting strategies.

Main Results:

• Native English listeners adjusted their use of f0 (secondary cue) when voice onset time (primary cue) conflicted.
• Native Korean listeners' adaptation varied but was predictable by initial cue-weighting.
• Listeners prioritizing f0 adjusted VOT, mirroring native "downweighting" of secondary cues.

Conclusions:

• Non-native listeners exhibit native-like sensitivity to distributional information in speech input.
• Non-native listeners adjust phonetic categorization in response to distributional changes.
• Initial cue-weighting strategies govern the specifics of phonetic category adaptation in non-native listeners.