Working memory capacity predicts sensitivity to prosodic structure

Area of Science:

• Psycholinguistics
• Cognitive Psychology
• Auditory Perception

Background:

• Speech prosody, encompassing intonation, loudness, and rhythm, is crucial for language comprehension.
• Variability in prosody perception and interpretation among listeners is well-documented but its origins remain unclear.
• A potential link exists between prosodic processing and working memory due to shared reliance on syntactic structure processing.

Purpose of the Study:

• To investigate the relationship between working memory capacity and the ability to recognize and classify prosodic structures.
• To determine if working memory is a significant factor in how individuals process speech prosody.

Main Methods:

• Healthy adult Dutch speakers participated in a gating paradigm experiment to judge prosodic structures.
• Participants evaluated phrases with early and late intonational cues indicating internal grouping.
• Verbal working memory (digit span) and processing speed (letter comparison) were assessed.

Main Results:

• A significant interaction was found between prosody judgment performance and working memory capacity.
• Listeners with higher working memory capacity demonstrated superior prosodic structure classification.
• These high-working memory listeners required less auditory information to accurately identify prosodic structures.

Conclusions:

• Working memory capacity is a key component in the processing of speech prosody.
• The findings suggest that cognitive resources, particularly working memory, are essential for accurate prosody interpretation.
• This research highlights the interplay between auditory perception and higher-level cognitive functions in language comprehension.