form2 - 4. Representation of Shapes E. Interpathway...

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4. Representation of Shapes E. Interpathway Cooperation and Localization 4. Representation of Shapes E. Interpathway Cooperation and Localization i. Between / Mean(within) 1 when the mixed presentation produces an illusion equal to the average single medium presentation. ii. For the Ponzo and HV illusion the ratio 1. iii. For the Zöllner illusion the ratio was < 1 but > 0. 4. Representation of Shapes F. Apparent Motion and Disparity Frame/Eye 1 Frame/Eye 2 4. Representation of Shapes F. Apparent Motion and Disparity i. Apparent motion can generally be seen when the border contrast differs between frames (e.g., colour and luminance). ii. Stereopsis (disparity) occurs if the same attribute is presented to the two eyes, but not when different attributes are presented to the two eyes 1
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4. Representation of Shapes G. Conclusions i. Aftereffect, illusion and visual search paradigms demonstrate the orientation is encoded on all channels. ii. 3D shape information can be extracted from all ‘pathways’ (i.e., attributes) when there are explicit contours but not when there are only implicit contours (e.g., shape from shading). iii. There is inter-pathway cooperation for perspective (the Ponzo illusion), size (the HV illusion) and motion. iv. Stereopsis works for each attribute separately but apparently not when different attributes are presented to each eye. 5. Contours and Figure/Ground Segregation
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This note was uploaded on 04/20/2011 for the course PSYC 212 taught by Professor Shahin during the Fall '11 term at McGill.

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form2 - 4. Representation of Shapes E. Interpathway...

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