Does seeing an Asian face make speech sound more accented?

Area of Science:

• Psycholinguistics
• Speech Perception
• Social Psychology

Background:

• Previous research indicates exposure to Asian faces can increase perceived accentedness of American English speech.
• The underlying mechanism of this effect—whether perceptual or decision-based—remains unclear.

Purpose of the Study:

• To investigate whether the influence of facial ethnicity on accentedness judgments is perceptual or occurs at a later decision stage.
• To differentiate between interpretation and perception in the context of accented speech processing.

Main Methods:

• Replication of prior findings using static images and speech stimuli.
• Utilizing dubbed videos to reduce demand characteristics and employing contrast bias and mixed designs.
• Application of the selective adaptation paradigm to assess perceptual shifts in accented speech.

Main Results:

• The shift in perceived accentedness diminished when static images were replaced with videos.
• Contrast bias and mixed designs altered or eliminated the effect of facial ethnicity on accentedness ratings.
• The selective adaptation paradigm showed no perceptual adaptation to accented speech based on visual ethnic cues.

Conclusions:

• Visual information, specifically facial ethnicity, influences the interpretation of accented speech, affecting later decision-making processes.
• The effect of facial ethnicity on accentedness judgments is not rooted in early perceptual processing but rather in higher-level cognitive interpretation.
• These findings highlight the distinction between perceptual processing and interpretive biases in understanding speech perception.