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Particpant ID: 09 (only temporally unstable perceptions are shown)
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a) ~ 0.83 Hz
c) ~ 0.83 Hz
b) ~ 0.5 Hz

Click on the images to see a higher resolution version (for computer monitors).

NOTE: The participant reported "moving shadows" on the white spaces (a contrast variation phenomenon). This is visible only on the high resolution images, not on the thumbnails. The description for stimulus a) is very low contrast and is not visible if the monitor is not gamma-calibrated.

This work was supported by grants from the Deutsche Forschungsgemeinschaft to R. Sireteanu (SI 344/17-2,3) and partly from Romanian CNCSIS to A.Iftime (TD-48/2008)