Long lasting musical training modifies language processing: a Dichotic Fused Word Test study.

Area of Science:

• Neuroscience
• Cognitive Science
• Auditory Processing

Background:

• Musical training is known to modify neural areas involved in music and language.
• It enhances speech perception and discrimination by engaging right hemisphere regions typically associated with music.

Purpose of the Study:

• To investigate if extended musical training leads to reduced left-hemisphere dominance for speech processing.
• To test the hypothesis that musicians exhibit altered speech perception compared to non-musicians.

Main Methods:

• Two groups of right-handed individuals (musicians and non-musicians) participated.
• A Dichotic Fused Word Test was administered, presenting different rhyming words/pseudo-words to each ear simultaneously.
• The right ear advantage (REA), indicating left-hemisphere dominance for speech, was measured.

Main Results:

• Musicians demonstrated an attenuation or complete suppression of the dichotic effect (REA).
• Most musicians perceived both simultaneously presented words, unlike the typical right ear advantage.
• This effect extended to pseudo-words, indicating phonetic processing was involved.

Conclusions:

• Musical training may lead to bilateral speech processing, with both hemispheres contributing similarly to language.
• This suggests a potential shift from typical left-hemisphere dominance in speech processing among musicians.
• Musical training could enhance bilateral processing of phonetic stimuli independently of semantic content.