Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 19 of 19 for “"Stop-signal"”.
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Visual-tactile stop signal inhibition
… infrequent presentation of visual or tactile stop signals. Participants were to perform fast saccadic or manual responses to a visual or tactile target, but to cancel the response on the 25% of trials in which a stop signal of the other sensory modality was additionally presented. Reaction …
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Separating Within-trial Activities in the Stop Signal Task Using fMRI
… rapidly unfolding within-trial activities in a stop signal task using fMRI. Current models of inhibitory control address processes that are engaged after the presentation of go- and stop-signals. The first study presented here separated warning- from response-phase activities in healthy adults …
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Re-Examining the Stop-Signal Task to Test Competing Theories of AD/HD
… by conducting fine-grained analyses of the Stop-Signal Task and another putative measure of behavioral inhibition, the Gordon Continuous Performance Test (G-CPT), in a large sample of children and adolescents. The inhibition theory posits that performance on these tasks reflects increased …
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High-Definition Fiber Tracking Study of the Executive Control Network in Blast-Related Traumatic Brain Injury
… neuropsychological evaluation that included the Stop Signal Task (SST) and structural magnetic resonance imaging. HDFT was used to derive quantitative metrics of tracts between the dorsolateral prefrontal cortex (DLFPC) and the putamen, caudate, and thalamus. Groups had similar demographic …
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READY, STEADY, AND GO. A Transcranial Magnetic Stimulation Study of Set-Related Inhibitory Activity in the Human Dorsal Precentral Region
… planned movements when appropriate, but also to stop them if required. Action initiation and control are characteristic features of many of our daily life actions. There is a large amount of evidence in monkeys and humans suggesting that the dorsal premotor cortex (PMD) and the supplementary …
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The Role of the Basal Ganglia in Memory and Motor Inhibition
… (including the Go/No-Go, Think/No-Think, and Stop-signal tasks), and discovered that there may be different subprocesses of inhibition. For instance, while the Go/No-Go task may require preventing a response from taking place, the Think/No-Think and Stop-signal tasks may require cancelling an …
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Arousal theory and the interrelationships of caffeine, nicotine and impulsivity
… engaged in three behavioral tasks: the Stop Signal Task (SST), the Stroop Color-Word Test (SCWT), and the Delay Discounting Task (DDT). Drug intake did not produce significant changes across conditions on any of the three tasks. The hypothesis that caffeine and nicotine have an …
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Electroencephalographic and Cognitive Underpinnings of Inhibitory Control in Obsessive-Compulsive Disorder: From Actions to Thoughts
… ability to control actions as measured by the Stop-Signal/Go No-Go task; (ii) They also present deficits in attentional set-shifting in an extra-dimensional set-shifting task; (iii) OCD is marked by difficulties in the ability to control thoughts, as demonstrated by a Retrieval-Induced …
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Functional organisation of behavioural inhibitory control mechanisms in cortico-basal ganglia circuitry: implications for stimulant use disorder.
… included behavioural flexibility, ‘waiting’ and ‘stopping’ impulsivity and involved serial spatial reversal learning task in rodents, and in humans, premature responses in the Monetary Incentive Delay (MID) task and the stop-signal reaction time task. Chapter 2 and Chapter 3 focus on individual …
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The Influence of Media Violence on the Neural Correlates of Empathic Emotional Response
… were examined while participants completed a stop-signal task using emotional faces. At baseline, gamers and nongamers performed equally well at a gender discrimination task and at inhibiting behavior, but gamers had significant reductions in their ACC generated N200 component, reflective of …
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Hedonia and Eudaimonia: Associations with Academic Success, Wellbeing, and Neuropsychological Functioning
… test, Wisconsin Card Sorting Task, and a Stop Signal task) and “hot” executive functioning (Iowa Gambling Task, Temporal Discounting Task). Semester GPA was collected from school records. Eudaimonia was significantly positively associated with GPA. Eudaimonia was also significantly …
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Investigating priming, inhibition, and individual differences in visual attention
… I explore the role of inhibition (using a stop signal paradigm) in individual differences in abilities to avoid distraction, and examine how working memory capacity influences target selection. Results failed to elucidate this relationship and further research is needed to uncover whether …
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Bilingualism and executive functioning: language experience as more than a binary variable.
… some monolingual advantages becoming apparent in stop signal and colour shape tasks. There was no conclusive evidence for advantages related to frequent switching or linguistic distance. The use of a 2nd language within a dual language context, as described by the Adaptive Control Hypothesis, did …
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Recoding and reassignment in protists
… elongation and three anti-sense codons which signal termination. While variations to the standard rules of genetic decoding are widely acknowledged, recent advances in next generation sequencing techniques have provided a wealth of new examples across many species. In this thesis, I provide …
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Mechanisms of apathy in health and Parkinson's disease
… impulsivity in participants, in terms of their stop signal reaction time (SSRT). Compared to elderly controls, Parkinson's patients had a longer SSRT (more impulsive), with no differences in task accuracy or choice reaction time. Crucially, the effect of atomoxetine on SSRT depended on locus …
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Complete Genome Sequence and Pathogenicity of Two Swine Parainfluenzaviruses Isolated from Pigs in the United States
… sequences, highly conserved gene start and gene stop signal sequences. The length of each gene of these two viruses was similar except for the F gene, in which ISU92 had an additional 24 nt "U" rich 3â untranslated region (UTR). The P gene of these viruses were predicted to express the P protein …
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Examining the Relationship Between Impulsive Personalities and Neural Functioning in Cocaine-Addicted Participants
… of Adult Reading (WTAR). They then performed the stop signal task (SST) during functional magnetic resonance imaging (fMRI) to gather data on neural activation during Stop-Success (SS) and Stop-Failure (SF). fMRI data was analyzed using FSL imaging software. All statistics were run with SPSS …
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The Neurocognitive Sequelae of Chronic Traumatic Brain Injury and the Utility of Treatment with Methylphenidate
Traumatic Brain Injury (TBI) is a serious world-wide public health concern with a pressing need for adequate, effective long-term treatment. Cognitive deficits are a common complaint after TBI and persistent disabilities endure well into the chronic phases of the injury. Few recognised standard …