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

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Published: Jun 29, 2010
Keywords:
visual perception contrast sensitivity psychophysical method linear sine‑wave grating adolescents and adults

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Maria José Nunes Gadelha
Universidade Federal da Paraíba
Michael Jackson Oliveira de Andrade
Universidade Federal da Paraíba
Olívia Dayse Leite Ferreira
Universidade Federal da Paraíba
Rosália Carmen de Lima Freire
Universidade Federal da Paraíba
Natanael Antonio dos Santos
Universidade Federal da Paraíba

Abstract

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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Article Details

Issue
Vol. 12 No. 1 (2010)
Section
Artigos

Copyright to articles published in The Journal Of Psychology: Theory and Practice belongs to the authors, who grant Mackenzie Presbyterian University the not exclusive rights to publish the content. 

 

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