Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.12/5325
Título: Beware the serpent: The advantage of ecologically-relevant stimuli in accessing visual awareness
Autor: Gomes, Nuno
Silva, Samuel
Silva, Carlos Fernandes da
Soares, Sandra Cristina de Oliveira
Palavras-chave: Evolution
Snake detection theory
Continuous flashing suppression
Data: 2017
Editora: Elsevier
Citação: Evolution and Human Behavior, 38(2), 227-234. Doi: 10.1016/j.evolhumbehav.2016.10.004
Resumo: Snakes and spiders constitute fear-relevant stimuli for humans, as many species have deleterious and even fatal effects. However, snakes provoked an older and thus stronger evolutionary pressure than spiders, shaping the vision of earliest primates toward preferential visual processing, mainly in the most complex perceptual conditions. To the best of our knowledge, no study has yet directly assessed the role of ecologically-relevant stimuli in preferentially accessing visual awareness. Using continuous flash suppression (CFS), the present study assessed the role of evolutionary pressure in gaining a preferential access to visual awareness. For this purpose, we measured the time needed for three types of stimuli - snakes, spiders (matched with snakes for rated fear levels, but for which an influence on humans but not other primates is well grounded) and birds - to break the suppression and enter visual awareness in two different suppression intensity conditions. The results showed that in the less demanding awareness access condition (stimuli presented to the participants' dominant eye) both evolutionarily relevant stimuli (snakes and spiders) showed a faster entry into visual awareness than birds, whereas in the most demanding awareness access condition (stimuli presented to the participants' non-dominant eye) only snakes showed this privileged access. Our data suggest that the privileged unconscious processing of snakes in the most complex perceptual conditions extends to visual awareness, corroborating the proposed influence of snakes in primate visual evolution.
Peer review: yes
URI: http://hdl.handle.net/10400.12/5325
DOI: 10.1016/j.evolhumbehav.2016.10.004
ISSN: 1090-5138
Aparece nas colecções:WJCR - Artigos em revistas internacionais

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