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P300 Event-Related Potentials To A Phoneme Discrimination Task Requiring A Motor Response, Kaitlyn Chelsea Turner
P300 Event-Related Potentials To A Phoneme Discrimination Task Requiring A Motor Response, Kaitlyn Chelsea Turner
Theses and Dissertations
Speech perception typically takes place within the auditory cortex as evidenced by data collected using quantitative electroencephalography (qEEG). The purpose of this study was to determine if motor responses influence speech perception. We examined P300 event-related potentials during oddball stimulus recognition tasks that either required or did not require a motor response. Based on a review of the literature, it was hypothesized that similar areas of the brain would be activated in both the motor response task and the same task without a motor response immediately following the button-push condition. Two syllables, /ba/ and /ga/, were presented to 20 native …
Brain Mapping Of The Latency Epochs In A Mcgurk Effect Paradigm In Music Performance And Visual Arts Majors, Lauren Donelle Nordstrom
Brain Mapping Of The Latency Epochs In A Mcgurk Effect Paradigm In Music Performance And Visual Arts Majors, Lauren Donelle Nordstrom
Theses and Dissertations
The McGurk effect is an illusion that occurs when an auditory /ba/ is combined with a visual /ga/. The two stimuli fuse together which leads to the perception of /da/, a sound in between /ba/ and /ga/. The purpose of this study was to determine whether music performance and visual arts majors process mismatched auditory and visual stimuli, like the McGurk effect, differently. Nine syllable pairs were presented to 10 native English speakers (5 music performance majors and 5 visual arts majors between the ages of 18 and 28 years) in a four-forced-choice response paradigm. Data from event-related potentials were …
Brain Mapping Of The Mismatch Negativity Response To Vowel Variances Of Natural And Synthetic Phonemes, Lyndsy Marie Smith
Brain Mapping Of The Mismatch Negativity Response To Vowel Variances Of Natural And Synthetic Phonemes, Lyndsy Marie Smith
Theses and Dissertations
The mismatch negativity (MMN) is a specific event-related potential (ERP) component used frequently in the observation of auditory processing. The MMN is elicited by a deviant stimulus randomly presented in the presence of repeating stimuli. The current study utilized the MMN response in order to determine the temporal (timing) and linguistic processing of natural and synthetic vowel stimuli. It was hypothesized that a significant MMN response would be elicited by natural and synthetic vowel stimuli. Brain mapping of the MMN response was hypothesized to yield temporal resolution information, which would provide detail regarding the sequential processing differences between natural and …
Brain Mapping Of The Mismatch Negativity Response In Vowel Formant Processing, Elizabeth Anne Perry
Brain Mapping Of The Mismatch Negativity Response In Vowel Formant Processing, Elizabeth Anne Perry
Theses and Dissertations
The mismatch negativity (MMN) response, a passively-elicited component of the auditory event-related potential (ERP), reflects preattentive identification of infrequent changes in acoustic stimuli. In the current study, the MMN response was examined closely to determine what extent natural speech sounds evoke the MMN. It was hypothesized that a significant MMN response results during the presentation of deviant stimuli from which spectral energy within formant bands critical to vowel identification has been removed. Localizations of dipoles within the cortex were hypothesized to yield information pertaining to the processing of formant-specific linguistic information. A same/different discrimination task was administered to 20 adult …
The Elan Event-Related Potential In Children 5 To 12 Years Of Age, Melissa Crandall
The Elan Event-Related Potential In Children 5 To 12 Years Of Age, Melissa Crandall
Theses and Dissertations
The examination of Event Related Potentials during language processing tasks provides valuable information of how the brain processes language over time. In the current study, the development of the early left anterior negativity (ELAN) was analyzed in young children. Previous research has described the ELAN as a negative waveform elicited during syntactic processing between 200 and 500 ms post linguistic stimuli. Thirty children from 5 to 12 years of age listened to sentences that were linguistically correct, syntactically incorrect, or semantically incorrect. Sentences were presented for right monaural, left monaural, and binaural ear conditions to determine possible differences related to …
The N400 Event-Related Potential In Children Across Sentence Type And Ear Condition, Laurie Anne Hansen
The N400 Event-Related Potential In Children Across Sentence Type And Ear Condition, Laurie Anne Hansen
Theses and Dissertations
This study investigated the neurophysiology of semantic language processing in children, ages 5 to 12 years. A well-established marker of semantic processing, the N400 event related potential (ERP), was analyzed within and across child age groups. Child N400s were recorded in response to correct sentences, semantically incorrect sentences, and syntactically incorrect sentences. N400s were also recorded across ear condition to examine potential processing differences. Children across all age groups consistently demonstrated N400s in the semantic error condition. N400s were also regularly observed in the syntactic error condition; especially, for younger children. Younger children also demonstrated N400s even in response to …
The P600 Event-Related Potential Across Ages And Ear Conditions, Kyla Lewis Tree
The P600 Event-Related Potential Across Ages And Ear Conditions, Kyla Lewis Tree
Theses and Dissertations
Studying language development through event-related potentials provides specific information regarding how the brain processes specific aspects of language over time. In this study, the P600 component, a positive wave occurring approximately 600 ms post-stimulus and known for detecting syntactic errors, was specifically analyzed. Thirty children between the ages of 5 and 12 years listened to linguistically correct, syntactically incorrect, and semantically incorrect sentences in three ear conditions: monaurally to the right ear, monaurally to the left ear, and binaurally. The participants were instructed to judge the sentences to be correct or incorrect. Comparisons were then made of the latency and …
Auditory And Visual Correlates Of The Processing Of Gapping Structures In Adults, Tara Hansen
Auditory And Visual Correlates Of The Processing Of Gapping Structures In Adults, Tara Hansen
Theses and Dissertations
The purpose of this study was to compare event-related potential (ERP) effects of speech processing and effects in sentence reading elicited by sentences containing gapping structures, or a "missing" verb. N400 and P600 waveforms were collected in 20 adults between 18 and 30 years of age. Two experiments were conducted with each participant. In the two experiments ERP recordings were collected as sentences, some containing gapping structures, were presented to the subjects. In one experiment sentences were presented through headphones in sentences spoken at normal rate and with normal intonation. In the second experiment sentences with the same gapping structures …