Specificity for coarticulatory vowel nasality in lexical representations

Area of Science:

• Psycholinguistics
• Cognitive Neuroscience
• Speech Perception

Background:

• Word recognition relies on surface-level phonetic details.
• The encoding of these details in lexical representations and the roles of memory and attention are not fully understood.

Purpose of the Study:

• To investigate how subphonemic phonetic details, specifically coarticulatory nasality, are encoded in lexical representations.
• To examine the influence of memory and attention on the encoding of subphonemic information using lexical repetition priming.

Main Methods:

• Lexical repetition priming paradigm was employed.
• Listeners heard words repeated with either identical or altered coarticulatory patterns after a delay.
• Recognition times for repeated words were measured.

Main Results:

• Faster recognition of repeated words with consistent coarticulatory patterns.
• Increased coarticulatory specificity in delayed priming when listeners adapted to multiple talkers.

Conclusions:

• Subphonemic phonetic information, including coarticulatory patterns, is indeed encoded in the lexicon.
• The word-specific encoding of subphonemic details is an active cognitive process influenced by factors like talker variability and attention.