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Neuroimaging tests of sensorimotor theories of semantic memory hinge on the extent to which similar activation patterns are observed during perception and retrieval of objects or object properties. The present study was motivated by the hypothesis that some of the seeming discrepancies across studies reflect flexibility in the systems responsible for(More)
Sensorimotor theories of semantic memory require overlap between conceptual and perceptual representations. One source of evidence for such overlap comes from neuroimaging reports of co-activation during memory retrieval and perception; for example, regions involved in color perception (i.e., regions that respond more to colored than grayscale stimuli) are(More)
Many features can describe a concept, but only some features define a concept in that they enable discrimination of items that are instances of a concept from (similar) items that are not. We refer to this property of some features as feature diagnosticity. Previous work has described the behavioral effects of feature diagnosticity, but there has been(More)
Executive control (EC) generally refers to the regulation of mental activity. It plays a crucial role in complex cognition, and EC skills predict high-level abilities including language processing, memory, and problem solving, as well as practically relevant outcomes such as scholastic achievement. EC develops relatively late in ontogeny, and many(More)
Speech unfolds swiftly, yet listeners keep pace by rapidly assigning meaning to what they hear. Sometimes, though, initial interpretations turn out to be wrong. How do listeners revise misinterpretations of language input moment by moment to avoid comprehension errors? Cognitive control may play a role by detecting when processing has gone awry and then(More)
Cognitive control, otherwise known as executive function, refers to our ability to flexibly adjust or regulate habitual actions or behaviors. As a cluster of separable components, it depends heavily on the prefrontal cortex, one of the last brain regions to reach adult maturity. Cognitive control processes are thought to be among the key factors for(More)
Hypnotic drugs designed to treat insomnia in adults are now increasingly used in children, but the effects of these compounds on neonatal sleep are poorly understood. We investigated the hypnotic effects of the commonly prescribed non-benzodiazepine sleep agent Zolpidem (Ambien) on sleep architecture and electroencephalographic (EEG) activity in the(More)
Regions within the left inferior frontal gyrus (LIFG) have simultaneously been implicated in syntactic processing and cognitive control. Accounts attempting to unify LIFG's function hypothesize that, during comprehension, cognitive control resolves conflict between incompatible representations of sentence meaning. Some studies demonstrate co-localized(More)
ow are two very different tasks like remembering where your car is parked and understanding a sentence related? To remember where your car is parked (assuming you park in a different spot every day), you have to suppress irrelevant memories of previous parking spots and retrieve the appropriate memory of your current spot. To understand a sentence, you have(More)
Tien-Hua-Hu Reservoir is currently under planning by the Water Resources Agency, Taiwan to meet the increasing water demands of central Taiwan arising from rapid growth of domestic water supply, and high-tech industrial parks. This study develops a simulation model for the ten-day period reservoir operation to calculate the ten-day water shortage index(More)