Laboratory of Psychophysics

In the Laboratory of Psychophysics, we investigate visual information
processing in human observers with psychophysical methods, TMS, EEG,
and mathematical modelling.

Main topics of research are: feature integration, contextual modulation,
time course of information processing, and perceptual learning. In clinical
studies, deficits of visual information processing are investigated in
schizophrenic patients.

Non-retinotopic Motion. A group of three black disks is moving back
and forth. On the center disk, a white dot appears to move on a clock-
wise trajectory. However, this trajectoy only exists in a coordinate system
which moves with the group, i.e. in a non-retinotopic frame of reference
(assuming no eye movements are taking place).
This becomes immediately evident when the outer two disks (with respect
to the retinotopic frame of reference) are covered. Now, the white dots are
perceived retinotopically, in which case they move on a up-down and right-
left trajectory, respectively.
Boi, Öğmen, Krummenacher, Otto, Herzog (2009): A (fascinating) litmus
test for human retino- vs. non-retinotopic processing.