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A Fmri Of Fear Conditioning And Auditory Looming In Autism Spectrum Disorder, David Nicholas Top Jr.
A Fmri Of Fear Conditioning And Auditory Looming In Autism Spectrum Disorder, David Nicholas Top Jr.
Theses and Dissertations
Many autistic adults experience debilitating anxiety that interferes with their daily functioning. Atypical sensory processing and intolerance of uncertainty are cognitive processes linked to atypical limbic system functioning and impaired fear conditioning as potential mediators of anxiety in autism. A previous fear conditioning study using fMRI found atypical amygdala functioning in autism when the threat stimulus was only partially reinforced. The first aim of this dissertation is a multimethod examination of brain and psychophysiological response in autistic and in neurotypical adults during a fear conditioning/extinction task with the threat stimulus reinforced 100% percent of the time. We were also interested …
Dyslexia Beyond The Word: An Ecological Study Of Specific Reading Disorder, Benjamin T. Carter
Dyslexia Beyond The Word: An Ecological Study Of Specific Reading Disorder, Benjamin T. Carter
Theses and Dissertations
This dissertation discusses the effects of dyslexia on reading behavior and cognition. It does so by first outlining the overall incidence of dyslexia, providing current definitions, giving a history of scientific inquiry and discussing relevant contemporary research. Thirteen different analyses are then discussed (ten a priori and three post-hoc). Individuals with dyslexia were found to have increased fixation duration, first run dwell time, total dwell time, and refixation probability. The dyslexia group was also highly sensitive to lexical predictability. Within the reading network, the BOLD response was depressed in dyslexia during reading in the following regions: the left medial and …