423 research outputs found
Spatial attention increases performance but not subjective confidence in a discrimination task
Selective attention to a target yields faster and more accurate responses. Faster response times, in turn, are usually associated with increased subjective confidence. Could the decrease in reaction time in the presence of attention therefore simply reflect a shift toward more confident responses? We here addressed the extent to which attention modulates accuracy, processing speed, and confidence independently. To probe the effect of spatial attention on performance, we used two attentional manipulations of a visual orientation discrimination task. We demonstrate that spatial attention significantly increases accuracy, whereas subjective confidence measures reveal overconfidence in non-attended stimuli. At constant confidence levels, reaction times showed a significant decrease (by 15–49%, corresponding to 100–250 ms). This dissociation of objective performance and subjective confidence suggests that attention and awareness, as measured by confidence, are distinct, albeit related, phenomena
Spatial displacement, but not temporal asynchrony, destroys figural binding
What are the elementary features that the brain uses to bind spatially distinct parts in a visual scene into an unitary percept of an “object”? The Gestalt psychologists emphasized the extent to which motion, colour, luminance or spatial arrangement contribute towards object formation. Little is known about the role of timeper se, rather than motion, in constituting an object. In particular, does the visibility or saliency of an object change if the various parts making up the object are not presented simultaneously? Using a simple experimental design, we show that very small spatial displacements can significantly influence the saliency of an object while large temporal asynchrony has no significant effect
Optimization of Cultivation Pattern for Maximizing Farmers' Profits under Land- and Water Constraints by Means of Linear-Programming: An Iranian Case Study
Water Resources Planning and Managemen
Application of Multi-Site Stochastic Daily Climate Generation to Assess the Impact of Climate Change in the Eastern Seaboard of Thailand
Climate Change, Adaptation and Long-Term Prediction
Modeling Investigation of the Underground Dam on Samui Island, Southern Thailand
Water Resources Planning and Managemen
Studying the Effects of an Irrigation/Drainage Network on Groundwater Table Fluctuations Using 3D Groundwater Flow Modeling
Groundwater Hydrology, Irrigatio
An Analysis of MLR and NLP for Use in River Flood Routing and Comparison with the Muskingum Method
River, Estuarine and Coastal Dynamic
A Sequential Simulation-Optimization Model for Water Allocation from the Multi-Reservoir System in the Karkheh River Basin System, Iran
Water Resources Planning and Managemen
Under- versus Overestimation of Aquifer Hydraulic Conductivity from Slug Tests
Groundwater Hydrology, Irrigatio
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