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Area of Science:

  • Auditory perception research
  • Neuroscience of brain injury
  • Speech processing

Background:

  • Perceiving nonnative-accented speech demands significant cognitive resources.
  • Mild traumatic brain injury (mTBI) can impair cognitive functions relevant to speech perception.
  • Individuals with mTBI may experience greater difficulty with nonnative-accented speech.

Purpose of the Study:

  • To investigate if individuals with a history of mTBI have reduced intelligibility of nonnative-accented speech.
  • To determine if mTBI history influences cognitive symptom reporting during nonnative-accented speech perception.
  • To compare speech perception in noise (SPIN) performance and symptom reporting between mTBI and control groups.

Main Methods:

  • Adults with (n=52) and without (n=69) a concussion history completed a SPIN task.
  • The task involved varying talker accent and signal-to-noise ratio.
  • Participants self-reported cognitive symptoms throughout the listening task.

Main Results:

  • Individuals with a concussion history showed differential effects when listening to nonnative-accented speech in noise.
  • mTBI group reported increased irritability, reduced energy, and headaches in challenging listening conditions compared to controls.
  • No explicit mention of intelligibility differences, but symptom exacerbation was noted.

Conclusions:

  • Past concussion may lead to subtle impairments in perceiving nonnative-accented speech in noise.
  • Difficult listening conditions can intensify symptoms associated with mild traumatic brain injury.
  • Further research is needed to fully understand the impact of mTBI on nonnative speech processing.