Individuals with Asperger’s Disorder (AD) have difficulty with social interactions and understanding sarcasm. One source of these deficits is the deficient use of pragmatic language. Right hemispheric (RH) dysfunction has been linked to trouble understanding sarcasm and using pragmatic language. This study attempted to determine the role of the RH in sarcasm comprehension by using a computerized dichotic listening task. Participants with AD were matched with typically developing participants and completed a dichotic listening task, brief intelligence assessment and a perceived accuracy questionnaire. The results showed participants from both groups performed similarly on the dichotic listening task. Interestingly, those with AD did not appear to have insight into their ability to identify sarcastic or sincere tones while the typically developing group did. / Department of Psychological Science

This dissertation presents results from three experiments to address two research questions: What do the acquisition and processing of information structure tell us about the acquisition and processing of language in general, and what do the acquisition and processing of information structure tell us about the nature of information structure as a syntactic and pragmatic phenomenon? The first two experiments were behavioral studies of native and L2 speakers of French in which subjects made acceptability judgments of sentences containing felicitous or infelicitous information structure. In Experiment 1, there was evidence of a postmaturational effect of age of arrival on judgment task scores; the geometry of this age effect did not show evidence of leveling off over time, contrary to the predictions of some formulations of the critical period hypothesis for second language acquisition (e.g. Newport, 1990; cf. Birdsong & Molis, 2001). The results of this experiment are interpreted as evidence against the presence of a critical period for the acquisition of information structure in a second language. In Experiment 2, L2 learners in low- and high-proficiency groups performed a similar judgment task. Low-proficiency L2 learners exhibited lower scores on the information structure anomaly judgment task than did high-proficiency L2 learners and L1 speakers. The behavioral results from this experiment, in conjunction with electrophysiological data from Experiment 3, suggest that many subjects judged the target sentences based on truth value, rather than information structure. In Experiment 3, subjects were presented with sentences containing felicitous and infelicitous information structure while a 14-channel electroencephalogram (EEG) was recorded. Results from this experiment suggest the presence of an N400 and P600 effect indexed with the processing of information structure anomalies in native-speaking subjects. L2 subjects of both high- and low-proficiency also exhibited a late positivity; however, results for the two groups diverged in the earlier time window, suggesting that high-proficiency speakers exhibit a P600 but low-proficiency speakers exhibit a P3 effect reflecting the processing of oddball stimuli. Taken together, the results from these experiments suggest that L2 speakers can acquire aspects of information structure processing to a nativelike degree. / text

published_or_final_version / Linguistics / Master / Master of Philosophy

published_or_final_version / abstract / toc / Linguistics / Master / Master of Philosophy

Ο σχηματισμός του αορίστου σε ασθενείς με σημασιολογική άνοια και ήπια γνωσιακή διαταραχή. / Past tense formation in patients with semantic dementia and mild cognitive impairment.

The current study utilized a priming paradigm in conjunction with a visual halffield presentation to determine if the right hemisphere contributes to pragmatic processing. Primes included conversational dialogues that either performed a speech act or did not. The targets identified the speech act and were presented to one of the two visual fields (lvf-RH or rvf-LH). It was hypothesized that the right visual field-left hemisphere (rvf-LH) would be more accurate and faster at identifying targets regardless of the script type that preceded it and the left visual field-right hemisphere (lvf-RH) would be significantly more accurate and faster at identifying targets when preceded by a script that performed the identified speech act. Results indicated that the lvf-RH was more accurate and faster at identifying a target regardless of the type of script that preceded it, while the rvf-LH was differentially affected by the type of script. / Department of Psychological Science

This doctoral work consists of several studies that investigated the relationship between language lateralization and structural asymmetries found in auditory and language-related regions of the human brain. Language lateralization was determined via the intracarotid Sodium Amytal procedure in epilepsy patients. In study 1, three groups of patients were investigated: a left speech group (LSG); a right speech group (RSG); and a bilateral speech group (BSG). Two auditory cortex regions: Heschl's gyrus (HG) and the planum temporale (PT) were labelled on the magnetic resonance imaging scan of each subject. Additionally, an automatic voxel-based morphometry (VBM) analysis was performed. The overall findings suggested that the structural asymmetries found in the auditory regions did not clearly and directly relate to language lateralization. The VBM analysis, however, revealed a grey matter concentration difference in the region of Broca's area favoring the left hemisphere (LH) in the LSG, and the right hemisphere (RH) in the RSG. That structural difference did relate to language lateralization and was further investigated in studies 2 and 3. Previously collected positron emission tomography data were examined in these two studies. Three regions of interest (ROI) analyses and one group average analysis were performed. Activation related to various speech tasks was examined. The ROI analyses revealed a significant activation difference favoring the LH for two targeted speech-task subtractions but only for the LSG. The group analysis, in contrast, revealed that the LSG showed a functional asymmetry favoring the LH, and that the RSG showed a functional asymmetry favoring the RH. Overall, the present results provided only partial evidence for a relationship existing between structural asymmetry in Broca's area and language lateralization. The structural asymmetries found in HG and the PT, in contrast, did not clearly and directly relate to language

Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 126-138). Available also in a digital version from Dissertation Abstracts.

Thesis (Ph. D.)--University of Hong Kong, 2005. / Title proper from title frame. Also available in printed format.

Thesis (Ph. D.)--University of California, San Diego and San Diego State University, 2006. / Vita. Includes bibliographical references (leaves 139-148).