Language Experience with a Native-Language Phoneme Sequence Modulates the Effects of Attention on Cortical Sensory...

Area of Science:

• Neuroscience
• Auditory Neuroscience
• Psycholinguistics

Background:

• Auditory evoked potentials (AEPs) reveal spectro-temporal changes in speech.
• AEPs are reliable for assessing auditory processing deficits.
• The influence of attention and native language on AEPs remains an area of investigation.

Purpose of the Study:

• To investigate if attentional modulation alters AEP morphology.
• To determine if native language phoneme sequence experience affects attention's influence on AEPs.

Main Methods:

• Native English and Polish adults listened to nonsense word pairs with varying phoneme onsets.
• Participants were tested under two attention-modulating conditions: 'with task' and 'without task'.
• Experimental conditions were counterbalanced and separated by at least two months.

Main Results:

• Task conditions did not alter AEP morphology.
• Attention induced a negative shift in the overall AEP waveform.
• This attentional effect was modulated by native language phoneme experience, notably for Polish listeners and the /pt/ onset.

Conclusions:

• Attention impacts AEPs, with effects modulated by native language phoneme exposure.
• A negative shift in AEPs indicates attentional modulation.
• Findings suggest intermediate auditory cortex mechanisms facilitate native language recognition, particularly under reduced attention demands.