Effects of
asynchrony on symmetry perception
Gert van der Vloed, Árpád
Csathó,
Peter A. van der
Helm
Abstract.
The effect of temporal image segmentation on symmetry perception was
investigated by means of stimuli composed of one part surrounding
another. The two parts could be presented synchronously or with a
temporal offset (20-100
ms), and each part could be either symmetrical or random. The task was
to
discriminate completely symmetrical (S) stimuli (in Experiment 1) or
completely
random (R) stimuli (in Experiment 2) from partially symmetrical (PS)
stimuli
in which one part was symmetrical and the other random. The R stimuli
showed
an asynchrony effect but the S stimuli did not. Furthermore, in both
experiments,
the PS stimuli showed an asynchrony effect when the symmetrical part
was
presented last but not when the symmetrical part was presented first
(independent
of whether it was the surrounded part or the surrounding part). Both
results
suggest that symmetry is strong enough to override this kind of
temporal
image segmentation.
|
Psychological
Research, 71, 170--177 (2007) |
Full
text |
|
Peter
A. van der Helm 