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D. Devyatko1
  • 1 Lomonosov Moscow State University., 1 Leninskie Gory, Moscow, 119991, Russia

Contribution of Object Representations and Visual Attributes to Illusory Visual Disappearances

2012. Vol. 9. No. 2. P. 107–115 [issue contents]

The phenomenon of “motion-induced blindness” involves a visible stimulus presented against a rotating background so that the awareness of the target stimulus stops from time to time. A possible cause of such illusory disappearances is the competition between the object representations of the target stimulus and of the mask (Bonneh et al., 2001). However, no studies to date have investigated the number of visual attributes differentiating the target stimulus from the mask necessary for the disappearance mechanism of motion-induced blindness to start functioning. In the experiment, target stimuli were used that differentiated from the mask elements on one, two or three attributes (form, color or movement), while the mask always represented the rotating rotation of blue crosses around its axis square of blue crosses. 25 subjects took part in the study, and the intrasubjective plane 2x2x2 was used. We measured the duration and the quantity of disappearances of the target stimulus during motion-induced blindness. Dispersion analysis with repeated measurements found out the main effects of difference / similarity of color (F(1, 24)=64.498, p<.001, ηp2=.729) and movement (F(1, 24)=72.023, p<.001, ηp2=.750) for the quantity of disappearances of the target stimulus. Also a less pronounced effect of difference / similarity of form of the target stimulus was found (F(1,24)=6.267, p<.05, ηp2=.207).Significant interactions were found for the following pairs of factors were found: form and color (F(1,24)=29.293, p<.001, ηp2=.550), andform and movement (F(1,24)=10,578, p<0,01, ηp2=0,306). For the total duration of disappearances, significant main effects of the factors of difference / similarity for color (F(1,24)=7.709, p<.01, ηp2=.243) and movement (F(1,24)=39.211, p<.001, ηp2=.620) were found. Besides, there were significant interactions of all three factors (F(1,24)=15.645, p<.01, ηp2=.395) and pairs of factors of difference / similarity of form and color (F(1,24)=15.936, p<.01, ηp2=.399) and form and movement (F(1,24)=7.040, p<.01, ηp2=.227). Thus, any single differentiating attribute was shown to be sufficient to cause the disappearance phenomenon. The color difference between the target stimulus and the mask influences the number of visual disappearances, whereas the movement difference influences their duration. The increase in quantity of differentiating attributes may lead to an increase in the quantity or / andand / or duration of disappearances of the target stimulus. The acquired results support the theory of competition of the object representations as a mechanism of illusory disappearances.

Citation: Devyatko, D. V. (2012). Ob"ektnye reprezentatsii i zritel'nye priznaki: vklad v illyuzornye zritel'nye ischeznoveniya [Contribution of Object Representations and Visual Attributes to Illusory Visual Disappearances]. Psychology. Journal of Higher School of Economics, 9(2), 107-115. (in Russian)
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