Processing word prosody-behavioral and neuroimaging evidence for heterogeneous performance in a language with...

Area of Science:

• Neuroscience
• Psycholinguistics
• Cognitive Science

Background:

• Word stress processing variability is significant in languages like German.
• Previous research overlooked interindividual differences in stress processing.
• Speakers of variable stress languages are expected to excel in stress tasks.

Purpose of the Study:

• Investigate interindividual variability in German word stress processing.
• Identify behavioral predictors of stress processing differences.
• Determine neural correlates of individual variability in stress processing.

Main Methods:

• Behavioral and functional magnetic resonance imaging (fMRI) study.
• Twenty-five native German speakers performed sequence recall tasks (segmental and suprasegmental stimuli).
• Analyzed behavioral data and brain activity (fMRI) to find group differences.

Main Results:

• Suprasegmental processing activated a widespread network (inferior frontal gyrus, insula, precuneus, cerebellum, basal ganglia, SMA).
• Significant group differences in word stress processing observed in the left middle temporal gyrus and left precuneus.
• Interactions between condition, group, and brain regions (hippocampus, cerebellum) were found.

Conclusions:

• Interindividual differences in word stress processing are evident even in variable stress languages.
• Behavioral performance in stress processing is linked to auditory perception (duration discrimination) and working memory.
• Neural and cognitive foundations of stress processing show significant individual variability.