Neurophysiological evidence of delayed segmentation in a foreign language

Area of Science:

• Cognitive Science
• Neuroscience
• Linguistics

Background:

• Speech segmentation is language-specific, complicating word identification in unfamiliar languages.
• Event-related potentials (ERPs) offer insights into speech processing and recognition.
• Previous research highlights challenges in foreign language segmentation.

Purpose of the Study:

• To investigate the delay in speech segmentation and word recognition for foreign language listeners.
• To compare word recognition in continuous speech between native and foreign listeners using ERPs.
• To explore the role of language-specific skills in continuous speech processing.

Main Methods:

• Compared Dutch native speakers and English native speakers (foreign listeners) on Dutch speech segmentation.
• Utilized the repetition effect on event-related potentials (ERPs) as a measure of word recognition.
• Familiarized participants with words in isolation and in continuous speech contexts.

Main Results:

• Word repetitions in isolation were recognized equally well by native and foreign listeners.
• Native listeners recognized repeated words in continuous speech faster than foreign listeners.
• Native listeners detected word repetitions within a continuous speech context, while foreign listeners did not.
• Speech context facilitated recognition for native listeners but hindered it for foreign listeners.

Conclusions:

• Foreign listeners exhibit a significant delay in segmenting and recognizing words in continuous unfamiliar speech compared to native listeners.
• Language-specific segmentation skills are crucial for efficient processing of continuous speech.
• The findings suggest that differences in language-specific skills underlie the observed segmentation rate disparities.