ID 28151
Title Transcription
Delboeuf サクシ ニオケル ハンダン ジュンジョ コウカ
Title Alternative
Judgment-order effect on apparent size in the Delboeuf illusion
Author
Paramei, Galina V. Institut fur Arbeitsphysiologie an der Universitat Dortmund
Ehrenstein, Walter H. Institut fur Arbeitsphysiologie an der Universitat Dortmund
Keywords
judgment-order effect
Delboeuf illusion
category rating
magnitude estimation
attention
Content Type
Departmental Bulletin Paper
Description
Apparent size of circles in the Delboeuf configuration was judged under variation of their diameters and compared to that of circle singletons of equivalent diameter. The primary purpose of the study was to investigate the effect of judgment order on the perceived size, i.e. starting with either inner or outer circle. In addition,we compared the measured strength of the illusion as obtained by two different methods - category rating and magnitude estimation. We found that the circle judged first had an assimilative effect on the apparent size of the subsequently judged circle,with the amount of the effect being contingent on diameter ratio and diameter difference of the constituent circles. Moreover,assimilation of the inner circle was more pronounced than that of the outer circle. The judgment-order effect may be accounted for by attentional mechanisms: if the outer circle is judged first,spatial span of attention is large,so that the inner circle falls in the span. Conversely,if the inner circle is judged initially,spatial span of attention is too small to take up the outer circle. The amount of illusion was greater when judged using magnitude estimation than category rating, conceivably due to a coarser internal mapping at the latter procedure.
Journal Title
徳島大学総合科学部人間科学研究
ISSN
09199810
NCID
AN1043724X
Publisher
徳島大学.総合科学部
Volume
8
Start Page
1
End Page
13
Sort Key
1
Published Date
2000-12-12
EDB ID
FullText File
language
jpn
departments
Integrated Arts and Sciences