Greg Siegle

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Neuroscientists have become increasingly interested in exploring dynamic relationships among brain regions. Such a relationship, when directed from one region toward another, is denoted by "effective connectivity." An fMRI experimental paradigm which is well-suited for examination of effective connectivity is the slow event-related design. This design(More)
Modern pupillometry has expanded the study and utility of pupil responses in many new domains, including psychiatry, particularly for understanding aspects of cognitive and emotional information processing. Here, we review the applications of pupillometry in psychiatry for understanding patients' information processing styles, predicting treatment, and(More)
There are many planning applications that require an agent to coordinate its activities with processes that change continuously over time. Several proposals have been made for combining a temporal logic of time with the differential and integral calculus to provide a hybrid calculus suitable for planning applications. We take one proposal and explore some(More)
People who have remitted from depression are at increased risk for relapse if they rate their relatives as being critical of them on a simple self-report measure of Perceived Criticism (PC). To explore neural mechanisms associated with this we used functional magnetic resonance imaging (fMRI) to examine how people with different levels of PC responded to(More)
OBJECTIVE In clinically anxious individuals, selective attention to negative cues in the environment may perpetuate a vicious cycle of emotional dysfunction. However, very little is known regarding the role of negative attentional bias in anxious older adults. There is evidence that in older adults without clinical anxiety, the opposite bias (toward(More)
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