Achromatic Contrast Sensitivity for Vertical Sine Wave Gratings in Adolescents and Adults

Detalhes bibliográficos
Autor(a) principal: Gadelha, Maria José Nunes
Data de Publicação: 2010
Outros Autores: de Andrade, Michael Jackson Oliveira, Ferreira, Olívia Dayse Leite, Freire, Rosália Carmen de Lima, dos Santos, Natanael Antonio
Tipo de documento: Artigo
Idioma: por
Título da fonte: Psicologia (Universidade Presbiteriana Mackenzie. Online)
Texto Completo: http://editorarevistas.mackenzie.br/index.php/ptp/article/view/2462
Resumo: The aim of this study was to characterize the contrast sensitivity function (CSF) of adolescents and young adults. Was measured FSC for linear sine‑wave grating stimuli with spatial frequencies of 0.25, 1.0, 2.0 and 8.0 cpd, using the forced‑choice psychophysic method with two alternatives temporal. The measurements were performed with binocular vision and the medium luminance of 42.6 cd/m2. All participants had normal acuity and were free of ocular pathology. The analysis showed significant differences between the two groups in the low medium and high frequencies. The adults were more sensitive than adolescents in low frequencies (0.25 cpd) and adolescents were more sensitive than adults in middle and high frequencies (2.0 and 8.0 cpd). These results suggest that the process of development and maturation of the visual perception of contrast interacts differently with the mechanisms that process spatial frequencies.
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spelling Achromatic Contrast Sensitivity for Vertical Sine Wave Gratings in Adolescents and AdultsSensibilidad al Contraste Acromático para Redes Sinusoidais Vertical en Adolescentes y AdultoSensibilidade ao Contraste Acromático para Grades Senoidais Verticais em Adolescentes e Adultosvisual perceptioncontrast sensitivitypsychophysical methodlinear sine‑wave gratingadolescents and adultspercepción visualsensibilidad al contrastemétodo psicofísicoonda senoidaladolescentes y adultospercepção visualsensibilidade ao contrastemétodo psicofísicograde senoidal linearadolescentes e adultosThe aim of this study was to characterize the contrast sensitivity function (CSF) of adolescents and young adults. Was measured FSC for linear sine‑wave grating stimuli with spatial frequencies of 0.25, 1.0, 2.0 and 8.0 cpd, using the forced‑choice psychophysic method with two alternatives temporal. The measurements were performed with binocular vision and the medium luminance of 42.6 cd/m2. All participants had normal acuity and were free of ocular pathology. The analysis showed significant differences between the two groups in the low medium and high frequencies. The adults were more sensitive than adolescents in low frequencies (0.25 cpd) and adolescents were more sensitive than adults in middle and high frequencies (2.0 and 8.0 cpd). These results suggest that the process of development and maturation of the visual perception of contrast interacts differently with the mechanisms that process spatial frequencies.El objetivo de este estudio fue caracterizar la función de sensibilidad al contraste (FSC) de los adolescentes y adultos jóvenes. Se midió la FSC para estímulos de onda senoidal con frecuencias espaciales lineal de 0,25, 1,0, 2,0 y 8,0 cpg, utilizando el método psicofísico de la elección forzada con dos alternativas. Las mediciones se realizaron con la visión binocular y la luminancia media del 42,6 cd/m2. Todos los participantes presentaban acuidad visual normal y estaban libres de enfermedades oculares identificables. El análisis mostró diferencias significativas entre los dos grupos en las frecuencias de bajo, medio y alto. Los adultos eran más sensibles que los adolescentes en las frecuencias bajas (0,25 cpg) y los adolescentes eran más sensibles que los adultos en las frecuencias medias y altas (2,0 y 8,0 cpg). Estos resultados sugieren que el proceso de desarrollo y maduración de la percepción visual de contraste interactúa de manera diferente con los mecanismos que las frecuencias de proceso espacial.O objetivo desse estudo foi caracterizar a função de sensibilidade ao contraste (FSC) de adolescentes e adultos jovens. Mediu-se a FSC para estímulos de grade senoidal linear com frequências espaciais de 0,25; 1,0; 2,0 e 8,0 cpg, utilizando o método psicofísico da escolha forçada com duas alternativas temporais. As medidas foram obtidas com visão binocular e luminância média de 42,6 cd/m2. Todos os participantes apresentavam acuidade visual normal e estavam livres de doenças oculares identificáveis. As análises apontaram diferenças significantes entre os dois grupos nas freqüências baixas, médias e altas. Os adultos foram mais sensíveis que os adolescentes nas frequências baixas (0,25 cpg) e os adolescentes foram mais sensíveis que os adultos nas frequências médias e altas (2,0 e 8,0 cpg). Esses resultados sugerem que o processo de desenvolvimento e maturação da percepção visual de contraste interage de maneira distinta com os mecanismos que processam frequências espaciais.Editora Mackenzie2010-06-29info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/vnd.openxmlformats-officedocument.wordprocessingml.documenthttp://editorarevistas.mackenzie.br/index.php/ptp/article/view/2462Journal Psychology: Theory and Practice ; Vol. 12 No. 1 (2010); 59-70Revista Psicologia: Teoría y Práctica; Vol. 12 Núm. 1 (2010); 59-70Revista Psicologia: Teoria e Prática; v. 12 n. 1 (2010); 59-701980-69061516-3687reponame:Psicologia (Universidade Presbiteriana Mackenzie. Online)instname:Universidade Presbiteriana Mackenzie (UPM)instacron:UPMporhttp://editorarevistas.mackenzie.br/index.php/ptp/article/view/2462/2328http://editorarevistas.mackenzie.br/index.php/ptp/article/view/2462/8033Gadelha, Maria José Nunes de Andrade, Michael Jackson OliveiraFerreira, Olívia Dayse Leite Freire, Rosália Carmen de Lima dos Santos, Natanael Antonioinfo:eu-repo/semantics/openAccess2022-03-24T21:29:47Zoai:ojs.editorarevistas.mackenzie.br:article/2462Revistahttp://editorarevistas.mackenzie.br/index.php/ptp/indexPRIhttp://editorarevistas.mackenzie.br/index.php/ptp/oairevistapsico@mackenzie.br1980-69061516-3687opendoar:2023-01-12T16:39:39.853429Psicologia (Universidade Presbiteriana Mackenzie. Online) - Universidade Presbiteriana Mackenzie (UPM)false
dc.title.none.fl_str_mv Achromatic Contrast Sensitivity for Vertical Sine Wave Gratings in Adolescents and Adults
Sensibilidad al Contraste Acromático para Redes Sinusoidais Vertical en Adolescentes y Adulto
Sensibilidade ao Contraste Acromático para Grades Senoidais Verticais em Adolescentes e Adultos
title Achromatic Contrast Sensitivity for Vertical Sine Wave Gratings in Adolescents and Adults
spellingShingle Achromatic Contrast Sensitivity for Vertical Sine Wave Gratings in Adolescents and Adults
Gadelha, Maria José Nunes
visual perception
contrast sensitivity
psychophysical method
linear sine‑wave grating
adolescents and adults
percepción visual
sensibilidad al contraste
método psicofísico
onda senoidal
adolescentes y adultos
percepção visual
sensibilidade ao contraste
método psicofísico
grade senoidal linear
adolescentes e adultos
title_short Achromatic Contrast Sensitivity for Vertical Sine Wave Gratings in Adolescents and Adults
title_full Achromatic Contrast Sensitivity for Vertical Sine Wave Gratings in Adolescents and Adults
title_fullStr Achromatic Contrast Sensitivity for Vertical Sine Wave Gratings in Adolescents and Adults
title_full_unstemmed Achromatic Contrast Sensitivity for Vertical Sine Wave Gratings in Adolescents and Adults
title_sort Achromatic Contrast Sensitivity for Vertical Sine Wave Gratings in Adolescents and Adults
author Gadelha, Maria José Nunes
author_facet Gadelha, Maria José Nunes
de Andrade, Michael Jackson Oliveira
Ferreira, Olívia Dayse Leite
Freire, Rosália Carmen de Lima
dos Santos, Natanael Antonio
author_role author
author2 de Andrade, Michael Jackson Oliveira
Ferreira, Olívia Dayse Leite
Freire, Rosália Carmen de Lima
dos Santos, Natanael Antonio
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Gadelha, Maria José Nunes
de Andrade, Michael Jackson Oliveira
Ferreira, Olívia Dayse Leite
Freire, Rosália Carmen de Lima
dos Santos, Natanael Antonio
dc.subject.por.fl_str_mv visual perception
contrast sensitivity
psychophysical method
linear sine‑wave grating
adolescents and adults
percepción visual
sensibilidad al contraste
método psicofísico
onda senoidal
adolescentes y adultos
percepção visual
sensibilidade ao contraste
método psicofísico
grade senoidal linear
adolescentes e adultos
topic visual perception
contrast sensitivity
psychophysical method
linear sine‑wave grating
adolescents and adults
percepción visual
sensibilidad al contraste
método psicofísico
onda senoidal
adolescentes y adultos
percepção visual
sensibilidade ao contraste
método psicofísico
grade senoidal linear
adolescentes e adultos
description The aim of this study was to characterize the contrast sensitivity function (CSF) of adolescents and young adults. Was measured FSC for linear sine‑wave grating stimuli with spatial frequencies of 0.25, 1.0, 2.0 and 8.0 cpd, using the forced‑choice psychophysic method with two alternatives temporal. The measurements were performed with binocular vision and the medium luminance of 42.6 cd/m2. All participants had normal acuity and were free of ocular pathology. The analysis showed significant differences between the two groups in the low medium and high frequencies. The adults were more sensitive than adolescents in low frequencies (0.25 cpd) and adolescents were more sensitive than adults in middle and high frequencies (2.0 and 8.0 cpd). These results suggest that the process of development and maturation of the visual perception of contrast interacts differently with the mechanisms that process spatial frequencies.
publishDate 2010
dc.date.none.fl_str_mv 2010-06-29
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://editorarevistas.mackenzie.br/index.php/ptp/article/view/2462
url http://editorarevistas.mackenzie.br/index.php/ptp/article/view/2462
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv http://editorarevistas.mackenzie.br/index.php/ptp/article/view/2462/2328
http://editorarevistas.mackenzie.br/index.php/ptp/article/view/2462/8033
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/vnd.openxmlformats-officedocument.wordprocessingml.document
dc.publisher.none.fl_str_mv Editora Mackenzie
publisher.none.fl_str_mv Editora Mackenzie
dc.source.none.fl_str_mv Journal Psychology: Theory and Practice ; Vol. 12 No. 1 (2010); 59-70
Revista Psicologia: Teoría y Práctica; Vol. 12 Núm. 1 (2010); 59-70
Revista Psicologia: Teoria e Prática; v. 12 n. 1 (2010); 59-70
1980-6906
1516-3687
reponame:Psicologia (Universidade Presbiteriana Mackenzie. Online)
instname:Universidade Presbiteriana Mackenzie (UPM)
instacron:UPM
instname_str Universidade Presbiteriana Mackenzie (UPM)
instacron_str UPM
institution UPM
reponame_str Psicologia (Universidade Presbiteriana Mackenzie. Online)
collection Psicologia (Universidade Presbiteriana Mackenzie. Online)
repository.name.fl_str_mv Psicologia (Universidade Presbiteriana Mackenzie. Online) - Universidade Presbiteriana Mackenzie (UPM)
repository.mail.fl_str_mv revistapsico@mackenzie.br
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