Döva och normalhörandes bedömningar av manipulerade illusionsbilder
SamhällsvetenskapSocial sciences - psychology: visual perceptionIllusionsDeafnessSign languageAuditory cortexPerceptual compensation
Abstract
The present study examined if early deaf people and people with severe hearing
loss perceive visual information differently than hearing people. An experiment
was conducted with eight deaf participants and eight participants with normal
hearing. The participants were between the ages of 18-74 years. The
participants were asked to look at fifteen different images portraying
manipulated illusions, and then assess if the images were of the same size.
Subsequently another image depicting a different illusion with a face hidden in
it was presented to the participants. Their task was to find the hidden face in
the image. A Mann-Whitney U-test revealed that the deaf and the people with
severe hearing loss had significant better results of the first fifteen images.
This indicates that it was easier for this group to discover the changes of the
manipulated images. Still there was no significant difference between the
results of the two groups at the last image with the hidden face. The results
of the study indicate that early deaf individuals might have a more evolved
visual perception than hearing people.