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Using Eeg To Examine The Top Down Effects On Visual Object Processing, Joseph D. Borders
Using Eeg To Examine The Top Down Effects On Visual Object Processing, Joseph D. Borders
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Object recognition entails a complex interplay between top-down and bottom-up signals. Yet, limited research has investigated the mechanisms through which top-down processes, such as task context and behavioral goals impact the neural basis of visual object processing. Using electroencephalography (EEG), we studied the temporal dynamics of task and object processing to identify how early the impact of task can be observed. We recorded ERPs from participants as they viewed object images from four categories spanning animacy (Inanimate: roller-skate, motorbike; Animate: cow, butterfly) and size (Large: motorbike, cow; Small: roller-skate, butterfly) dimensions under four task conditions comprising conceptual (naturalness, size) and …
Investigating Neural Sensorimotor Mechanisms Underlying Flight Expertise In Pilots: Preliminary Data From An Eeg Study, Mariateresa Sestito, Assaf Harel, Jeff Nador, John Flach
Investigating Neural Sensorimotor Mechanisms Underlying Flight Expertise In Pilots: Preliminary Data From An Eeg Study, Mariateresa Sestito, Assaf Harel, Jeff Nador, John Flach
Psychology Faculty Publications
Over the last decade, the efforts toward unraveling the complex interplay between the brain, body, and environment have set a promising line of research that utilizes neuroscience to study human performance in natural work contexts such as aviation. Thus, a relatively new discipline called neuroergonomics is holding the promise of studying the neural mechanisms underlying human performance in pursuit of both theoretical and practical insights. In this work, we utilized a neuroergonomic approach by combining insights from ecological psychology and embodied cognition to study flight expertise. Specifically, we focused on the Mirror Neuron system as a key correlate for understanding …
How Configural Is The Configural Superiority Effect? A Neuroimaging Investigation Of Emergent Features In Visual Cortex, Olivia Michelle Fox
How Configural Is The Configural Superiority Effect? A Neuroimaging Investigation Of Emergent Features In Visual Cortex, Olivia Michelle Fox
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The perception of a visual stimulus is dependent not only upon local features, but also on the arrangement of those features. When stimulus features are perceptually well organized, a global configuration with a high degree of salience emerges from the interactions between these features, often referred to as emergent features. Emergent features can be demonstrated in the Configural Superiority Effect (CSE): presenting a stimulus within an organized context relative to its presentation in a disarranged one results in better performance. Prior neuroimaging work on the perception of emergent features regards the CSE as an "all or none" phenomenon, focusing on …
Perception And Control Of Locomotion, John M. Flach
Perception And Control Of Locomotion, John M. Flach
Psychology Faculty Publications
Over the past four years we have been studying problems of control and coordination with funds from AFOSR. Work over the first three years has been reviewed in the final report for the original AFOSR award (Flach, 1996). This report reviews work for the last year of the ASSERT grant. This work has focused on perception and control of low altitude flight. Experimental work from two synthetic task environments is described in this report. The first environment involved descent to low altitude. The key independent variables were speed of forward motion and optical texture (dot, grid, splay, depression). Results showed …
Perception/Action: An Holistic Approach, John M. Flach
Perception/Action: An Holistic Approach, John M. Flach
Psychology Faculty Publications
A general systems approach is taken to studying the emergent properties of the human perception/action system. Two task domains, the control of locomotion and the recognition of objects, are used to study human performance. The locomotion task involves the control of altitude. Experiments are described that will manipulate the type of texture, the speed of forward motion, and altitude. A general hypothesis is presented that performance in the altitude control task is a function of the signal-to-noise ratio within the flow field--where signal refers to optical activity resulting from change of altitude and noise refers to optical activity resulting from …