Efeitos do envelhecimento no contraste visual de grades senoidais

Autores

  • Maria José Nunes Gadelha Universidade Federal da Paraíba
  • Joenilton Saturnino Cazé da Silva Universidade Federal da Paraíba
  • Jandilson Avelino da Silva Universidade Federal da Paraíba
  • Michael Jackson de Oliveira Andrade Universidade Federal da Paraíba
  • Débora Najda de Medeiros Viana Universidade Federal da Paraíba
  • Natanael Antonio dos Santos Universidade Federal da Paraíba

DOI:

https://doi.org/10.15448/1980-8623.2016.3.22748

Palavras-chave:

Método psicofísico, Percepção, Contraste visual, Envelhecimento

Resumo

O objetivo desse estudo foi comparar as curvas de sensibilidade ao contraste de adultos e idosos. Foi medida a FSC para grades senoidais verticais utilizando o método psicofísico da escolha forçada (2AFC). Participaram desse estudo 18 adultos com idade entre 20 e 29 anos e 18 idosos com idade entre 60 a 69 anos, de ambos os sexos. A ANOVA mostrou efeito principal entre os grupos [F(1, 156) = 173,160; p < 0,001] e de interação entre as frequências espaciais e a idade [F(3,427) = 163,365; p < 0,001]. Já o teste Bonferroni mostrou diferenças significantes em todas as frequências testadas (p < 0,001). Verificou-se que o padrão da curva de SC se mantém com o envelhecimento, com a menor sensibilidade localizada nos extremos da curva e a maior sensibilidade localizada próxima ao centro da curva. Além disso, sugere-se alterações no processo senso perceptivo visual ao longo da vida.

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Biografia do Autor

Maria José Nunes Gadelha, Universidade Federal da Paraíba

Departamento de Psicologia, Neurociências.

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Publicado

2016-06-23

Como Citar

Gadelha, M. J. N., Cazé da Silva, J. S., da Silva, J. A., Andrade, M. J. de O., Viana, D. N. de M., & dos Santos, N. A. (2016). Efeitos do envelhecimento no contraste visual de grades senoidais. Psico, 47(3), 209–215. https://doi.org/10.15448/1980-8623.2016.3.22748

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