A5023262712- Visual perception and processing mechanisms
- Neural dynamics and brain function
- Autism Spectrum Disorder Research
- Behavioral and Psychological Studies
- Attention Deficit Hyperactivity Disorder
- Noise Effects and Management
- Color Science and Applications
- Retinal Development and Disorders
- EEG and Brain-Computer Interfaces
- Electron and X-Ray Spectroscopy Techniques
- Salivary Gland Disorders and Functions
- Retinal Imaging and Analysis
- Thyroid Disorders and Treatments
- Advanced Optical Imaging Technologies
- Outsourcing and Supply Chain Management
- Reading and Literacy Development
- Psychology of Development and Education
- Tactile and Sensory Interactions
- Color perception and design
- Ocular and Laser Science Research
- Olfactory and Sensory Function Studies
- Advanced Chemical Physics Studies
- Meat and Animal Product Quality
- Ophthalmology and Visual Impairment Studies
- Franchising Strategies and Performance
Bulgarian Academy of Sciences
1999-2022
Institute of Neurobiology
2010-2022
Contradictory results have been obtained in the studies that compare contour integration abilities Autism Spectrum Disorders (ASDs) and typically developing individuals. The present study aimed to explore limiting factors of ability ASD verify role external visual noise by a combination psychophysical eye-tracking approaches. To this aim, 24 children adolescents with 32 age-matched participants typical development had detect presence embedded among similar Gabor elements Yes/No procedure....
Visually evoked potentials (VEPs) were elicited by Gabor gratings with different lengths and widths at three spatial frequencies (SFs): low, 1.45 c/deg, medium, 2.9 c/deg high, 5.8 a contrast 3 times above the detection threshold each SF. An increase of grating length enhanced N1 amplitude occipital parietal positions stronger than width aspect ratios (length : width) 4:1. The effect stimulus was reflected also in later P1 component central positions. larger on VEP SF specific: it smaller...
Along with social, cognitive, and behavior deficiencies, peculiarities in sensory processing, including an atypical global motion have been reported Autism Spectrum Disorder (ASD). The question about the enhanced pooling ASD is still debatable. aim of present study was to compare integration using a low-density display equivalent noise (EN) approach. Fifty-seven children adolescents or typical development (TD) had determine average direction movement 30 Laplacian-of-Gaussian micro-patterns....
Background and aims Developmental disorders such as Autism Spectrum Disorder (ASD), Attention Deficit Hyperactivity (ADHD), Dyslexia (DD) are reported to have more visual problems, oral language difficulties, diminished reading skills in addition their different diagnostic features. Moreover, these conditions also increased internal noise probably an impaired ability of external filtering. The aim the present study was compare performance groups presence which disrupts automatic processes...
Green stimuli are more difficult to detect than red in the retinal periphery, as reported previously. We examined spatial characteristics of chromatic mechanisms using stimuli, modulated from an achromatic background each pole "red-green" cardinal axis DKL space at 20 deg eccentricity. The "blue-yellow" was also studied for comparison. By measuring both grating discrimination resolution limit (resolution acuity) and summation, assessed by Michaelis-Menten function, we demonstrated a marked...
Research has shown that the processing time for discriminating illusory contours is longer than real contours. We know, however, little whether visual processes, associated with detecting regions of surfaces, are also slower as those responsible luminance-defined images. Using a speed-accuracy trade-off (SAT) procedure, we measured accuracy function Kanizsa-type and squares embedded in 2D static luminance noise. The data revealed images were detected at speed images, while points time, when...
Abstract In many visual perception studies, external noise is used as a methodology to broaden the understanding of information processing stimuli. The underlying assumption that two sources limit sensory processing: inherent in environmental signals and internal or variability at different levels neural system. Usually, when added an image, it evenly distributed. However, color intensity image contrast are modified this way, unclear whether system responds their change presence. We aimed...
Visually evoked potentials (VEPs) to stimuli-gratings with varying length and width were recorded at 3 spatial frequencies (SFs), 1.45, 2.9 5.8 c/deg contrast three times above the detection threshold for each SF. The amplitude of first negative VEP wave, N1, increased a greater extent increase stimulus than higher medium SFs, c/deg. However, low SF, 1.45 c/deg, effects grating on N1 similar. Moreover, difference between second component, P1, was not observed all SFs studied. results...
Over the last few years, outsourcing industry in Bulgaria has been generating a steady increase GDP value and is constantly creating new jobs. The under current macroeconomic conditions described. A comparative study of financial results organizational structure companies conducted. As result, perspectives challenges for are outlined.