The strength of Vasarely and SLC illusions depends on line straightnessстатья
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Дата последнего поиска статьи во внешних источниках: 29 мая 2015 г.
Аннотация:It was shown (János Geier et al., 2004) that the Herman grid illusion disappeared when straight lines were changed to wavy or serrated lines. We used this idea to study two other visual illusions – the Vasarely illusion and simultaneous lightness contrast (SLC) illusion. We used six modifications of lines between right angles: three different wavy lines and three different serrated lines. To study the strength of both illusions we used a two-alternative forced choice discrimination task. Eleven naive subjects were tested. Our results showed that the strength of the illusory effect depended on the type of line: wavy lines decreased the illusory effect while serrated lines increased it. Thus a slight distortion of the lines changed line geometry such sensory illusions as the Vasarely illusion, simultaneous lightness contrast illusion and Herman grid illusion should be explained not only by sensory-level mechanisms -the response of retinal ganglion cells- but also by mid-level mechanisms.