Marcelo Fernandes Costa
Biographic Data
| ID | 3883798 |
|---|---|
| NAME | Marcelo Fernandes Costa |
| GIVEN NAMES | Marcelo Fernandes |
| FAMILY NAME | Costa |
| SIGNATURE | COSTA M F |
| AFFILIATIONS | Universidade de São Paulo |
| ORCID | 0000-0002-3944-8457 |
| VERIFIED | Yes |
| TOTAL WORKS | 5 |
| TOTAL CITATIONS | 0 |
| AUTHOR COUNT | 5 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2019 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 0 |
Luminance noise impacts putative luminance components of visual evoked potentials but not chromatic components
Introduction Pseudoisochromatic stimuli are widely used in psychophysical color vision testing and the features of the luminance noise present on these stimuli have been reported modifying the psychophysical chromatic discrimination. Objective The present study investigated how modifications in the luminance noise features (luminance contrast and number of luminance values) affect chromatic visual evoked cortical potentials (VECP) elicited by pse…
Ressonância Magnética Funcional: Princípios teóricos e possibilidade de ampliação da clínica psicológica
For more than a century. neuroimaging is used to perform diagnostic tests, imaging exams for clinical investigations, among others. Psychology follows this path focusing on evidence-based techniques, however, when the subject is neuroimaging, few psychologists working in the area are interested in the topic or even minimally understand how it works and what this type of knowledge is used for. In this article we bring a little of the need for a ps…
Desenvolvimento Do Protocolo Da Avaliação Da Visão Funcional Infantil (Avfi) Para Crianças Com Deficiência Visual
The vision system, as the most sophisticated sensory system has been arousing interest of researchers in several countries in the study of functional vision for children. In Brazil, there are some evaluations, but these are not based on psychophysical and psychosensory studies. Therefore, the present study sought to develop an adequate functional vision assessment using scientific criteria. The evaluation consists of 12 procedures, the instrument…
Health belief model for coronavirus infection risk determinants
OBJECTIVE: To use the advantages of a ratio scale with verbal anchors in order to measure the risk perception in the novel coronavirus infection, which causes covid-19, in a health belief model-based questionnaire, as well as its validity and reproducibility. METHOD: We used the health belief model, which explores four dimensions: perceived susceptibility (five questions), perceived severity (five questions), perceived benefits (five questions), …
A power law study of the edge influence on the perceived filling-in brightness magnitude
Background Edge plays a special role in spatial perception and as well as in determining the brightness of a surface within borders. The aim of our study was to measure threshold brightness in different levels of edges thickness. Methods Steven's power law for circles modulating in luminance was estimated for 30 subjects (mean age 24 years, SD 3.3, 13 female). Stimuli were presented on the iMac display using the 11-bit graphic board and consisted…
No prominent works on this page.
A power law study of the edge influence on the perceived filling-in brightness magnitude
Background Edge plays a special role in spatial perception and as well as in determining the brightness of a surface within borders. The aim of our study was to measure threshold brightness in different levels of edges thickness. Methods Steven's power law for circles modulating in luminance was estimated for 30 subjects (mean age 24 years, SD 3.3, 13 female). Stimuli were presented on the iMac display using the 11-bit graphic board and consisted…
Desenvolvimento Do Protocolo Da Avaliação Da Visão Funcional Infantil (Avfi) Para Crianças Com Deficiência Visual
The vision system, as the most sophisticated sensory system has been arousing interest of researchers in several countries in the study of functional vision for children. In Brazil, there are some evaluations, but these are not based on psychophysical and psychosensory studies. Therefore, the present study sought to develop an adequate functional vision assessment using scientific criteria. The evaluation consists of 12 procedures, the instrument…
Health belief model for coronavirus infection risk determinants
OBJECTIVE: To use the advantages of a ratio scale with verbal anchors in order to measure the risk perception in the novel coronavirus infection, which causes covid-19, in a health belief model-based questionnaire, as well as its validity and reproducibility. METHOD: We used the health belief model, which explores four dimensions: perceived susceptibility (five questions), perceived severity (five questions), perceived benefits (five questions), …
Ressonância Magnética Funcional: Princípios teóricos e possibilidade de ampliação da clínica psicológica
For more than a century. neuroimaging is used to perform diagnostic tests, imaging exams for clinical investigations, among others. Psychology follows this path focusing on evidence-based techniques, however, when the subject is neuroimaging, few psychologists working in the area are interested in the topic or even minimally understand how it works and what this type of knowledge is used for. In this article we bring a little of the need for a ps…
Luminance noise impacts putative luminance components of visual evoked potentials but not chromatic components
Introduction Pseudoisochromatic stimuli are widely used in psychophysical color vision testing and the features of the luminance noise present on these stimuli have been reported modifying the psychophysical chromatic discrimination. Objective The present study investigated how modifications in the luminance noise features (luminance contrast and number of luminance values) affect chromatic visual evoked cortical potentials (VECP) elicited by pse…
Psychology (3 works) · Computer Science (2 works) · Contrast (vision) (2 works) · Luminance (2 works) · Mathematics (2 works) · Medicine (2 works) · Optics (2 works) · Physics (2 works) · Visual perception and processing mechanisms (2 works) · 2019-20 coronavirus outbreak (1 works)