Poster A1, Saturday, March 25, 5:00 – 7:00 pm, Pacific Concourse
The effects of attention modulation on sensory processing of spoken words in native-English and native-Polish listeners
Monica Wagner1, Jungmee Lee2, Valerie L Shafer3; 1St. John's University, 2University of Wisconsin, Madison, 3The Graduate Center, City University of New York
Wagner and colleagues (2016) demonstrated that the cortical sensory waveforms of the auditory evoked potentials (AEPs), the P1-N1-P2 and T-complex, reflect spectro-temporal feature changes within the spoken word and can be used to probe auditory processing deficits within auditory cortex. In the present study, we assessed whether sensory waveform morphology that reflects spectro-temporal feature changes within words remains unchanged for different listening conditions. Two groups of 24 adults (12 native-English and 12 native-Polish in each group) listened to nonsense word pairs within two experimental conditions designed to modulate attention. In one condition, participants performed a behavioral task to the second word in the word pairs and in the alternate condition participants were instructed to listen to the word pairs without performing a task. Conditions were counterbalanced so that one group performed the “without task” condition as the first testing session and performed the “with task” condition as the second testing session and the alternate group performed the tasks in reverse order. Two or more months separated each testing session. Analyses revealed that waveform morphology remained unchanged for different listening conditions and suggests that the P1-N1-P2 and T-complex can be used to probe spectro-temporal feature processing of spoken words in clinical populations without task performance. Negative waveform shifts reflected attention, which was influenced by language experience and allocation of attention resources differed for the language groups from the earliest cortical stages.
Topic Area: ATTENTION: Auditory