28th International Congress of Psychology August 8 ... - U-netSURF

Although small eye movements constantly produce velocity noise in the retinal image, our visual
world always looks stable. It is proposed that the brain counteracts such spurious image motions
by assuming spatially common motions as originating in eye movements, interpreting relative
image motions only as originating in the movements of external objects. This idea is supported by
several illusions, where image motions due to eye movements can become visible if they are made
spatially uncommon. Further, small eye movements are found to deteriorate our near-threshold
performance in uniform-motion detection, without affecting relative-motion sensitivity, as
predicted by the proposed theory.
1063.33 Faces, races and norms, Janice E. Murray 1 , Laura Wells 1 , Gillian Rhodes 2 ,
1 2
University of Otago, New Zealand; University of Western Australia, Australia
Brief exposure to facial distortions alters perception of what is normal or average. European
participants judged the averageness of Chinese and European faces before and after adaptation to
own-race or other-race faces that had features expanded out from, or compressed into, the center
of the face. For compression distortions, greater adaptation effects were observed when the race of
the adapting and test faces matched. This suggests that faces from structurally distinct groups (e.g.,
different races) may be coded as deviations from a norm or average face, with separate norms
existing in memory to code the distinctive properties of each race.
1063.34 Parallel processing of illusory surface by binocular stereopsis, Daisuke Yoshino,
Masanori Idesawa, University of Electro-Communications, Japan
Previous studies have reported that visual search for illusory surface is detected in parallel, so that
search times are almost independent of the number of distractors (Davis & Driver, 1994; Yoshino
& Noguchi, 2002). In the present study, we investigated whether illusory surface is detected
efficiently with stereoscopic depth information included. The results showed that illusory surface
could be detected at a given time independent from the number of non-illusory surface distractors.
This finding implies that illusory surface can be detected in parallel by binocular stereopsis,
suggesting that illusory surfaces may be represented in the early visual mechanism.
1063.35 Pattern is unnecessary to have the same code as that of template in pattern recognition,
Hang Zhang, Zhongle Yang, South-central University for Nationalities, China
Generally considered to recognize a pattern, it becomes necessary to have the same code as that of
template. According to this viewpoint, whether the card involving 8 character patterns is presented
2s earlier or later than the other card involving 1 template, the recognizing correct rate under these
two conditions should be equal because patterns should be transformed into working memory and
the amount of the transformed patterns should be equal. The results showed the difference
between two correct rates is 40%. It suggests that the pattern is unnecessary to have the same code
with the template.
1063.36 Holistic recognition of face, Dejiang Fu, Bo Wang, Zhejiang University, China
By analyzing face and house, which were divided into four kinds of with-same-contour,
with-same-contents, with-different-content-and-contour, and without-contour, Evidences were
found that there is no inversion effect, and that the order of decreasing recognition rate of face in
version state, in increasing order, is with-different-content-and-contour, with-same-contents,
121