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

evaluate TV programs, it is difficult to establish guidelines in the production field. Therefore, in
this study, the authors attempted to evaluate a TV program for infants, experimentally. The
subjects were 51 healthy infants from 1 to 2 years of age. The stimuli chosen were from an
existing program, and presented in random order. The reactions of the subjects during presenting
the stimuli were video recorded, and analyzed by image processing.
1039.2 Evaluation of motion sickness induced by videogames, K. Ohta 1 , T. Kawai 1 , Y. Ebine 2 ,
R. Yamaguchi 2 , K. Murayama 2 , 1 Waseda University, Tokyo, Japan; 2 SEGA Corp., Japan
In this study, the authors extracted about 100 scenes that might induce motion sickness from
several existing videogames, and classified the images according to their characteristics through
analysis using image processing techniques. Using the results of the analysis, the images were
simulated in simplified computer graphics and investigated by altering the simulation parameters.
Further, the simulated visual stimuli were evaluated by an experiment using psycho-physiological
indexes. From the results of the experiment, presentation methods of videogame images to reduce
motion sickness were discussed.
1039.3 The relative roles of top-down and bottom-up processes in selective attention, J.L. Li,
S.L. Yeh, C.H. Hsiao, National Taiwan University, Taipei, Taiwan, China
By manipulating attentional setting and stimulus salience, top-down and bottom-up processes in
attentional capture were explored using spatial cuing tasks. Results showed that attentional shift to
a salient distractor occurred only when the distractor-to-target SOA was long; otherwise,
attentional shift was induced only by top-down control settings, although the salient distractor also
showed higher priority in processing. A model with activation threshold and decision criterion for
items processed in parallel is proposed to explain our results and several other important findings.
This model provides a theoretical framework for the interactions between the top-down and
bottom-up processes in attentional selection.
1039.4 The color appearance of chromatic textures, T.J. Hsieh, I.P. Chen, National Chiao Tung
University, Taiwan, China
Additive color mixture can be obtained by densely placed small color dots. We examined the
interaction between the spatial arrangement of color dots and the resultant color appearance of the
mixture pattern. The participants were asked to adjust the red/green ratio and intensity level of a
uniform field till its color matched that of a chromatic texture. We found that: (1) The type of
texture pattern, i.e. the spatial structure of the mixing dots, has a significant effect on the color
appearance judgment. (2) There is a close interdependent relationship between the settings of
red/green ratio and the intensity.
1039.5 A theory for perceptual fading: Evidence from perceptual filling-in (PFI) and
motion-induced blindness (MIB), L.C. Hsu, S.L. Yeh, National Taiwan University, Taipei, Taiwan,
China
PFI and MIB are two phenomena in which perceptually salient stimuli repeatedly disappear and
reappear after prolonged viewing. They were considered different mechanisms in which, PFI was
assumed to be caused by boundary adaptation and fast interpolation; while MIB might result from
high-level (e.g., attention) processes. We showed in a series of experiments that PFI and MIB
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