An Upward-Facing Surface Appears Darker: The Role Played by the Light-From-Above Assumption in Lightness Perception/ (Record no. 12436)
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| 000 -LEADER | |
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| fixed length control field | 01947nab a2200253 4500 |
| 005 - DATE & TIME | |
| control field | 20220803112324.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 220721b |||||||| |||| 00| 0 eng d |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Kobayashi, Yuki |
| 245 ## - TITLE STATEMENT | |
| Title | An Upward-Facing Surface Appears Darker: The Role Played by the Light-From-Above Assumption in Lightness Perception/ |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Name of publisher, distributor, etc | sage |
| Date of publication, distribution, etc | 2019 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Pages | Vol 48, Issue 6, 2019: (500-514 p.). |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc | The human visual system can extract information on surface reflectance (lightness) from light intensity; this, however, confounds information on reflectance and illumination. We hypothesized that the visual system, to solve this lightness problem, utilizes the internally held prior assumption that illumination falls from above. Experiment 1 showed that an upward-facing surface is perceived to be darker than a downward-facing surface, proving our hypothesis. Experiment 2 showed the same results in the absence of explicit illumination cues. The effect of the light-from-left prior assumption was not observed in Experiment 3. The upward- and downward-facing surface stimuli in Experiments 1 and 2 showed no difference in a two-dimensional configuration or three-dimensional structure, and the participants’ perceived lightness appeared to be affected by the observers’ prior assumption that illumination is always from above. Other studies have not accounted for this illusory effect, and this study’s finding provides additional insights into the study of lightness perception. |
| 650 ## - Subject | |
| Subject | lightness/brightness, |
| 650 ## - Subject | |
| Subject | light-from-above assumption, |
| 650 ## - Subject | |
| Subject | top-down processing, |
| 650 ## - Subject | |
| Subject | surface orientation, |
| 650 ## - Subject | |
| Subject | illumination |
| 700 ## - Added Entry Personal Name | |
| Added Entry Personal Name | Morikawa, Kazunori |
| 773 0# - HOST ITEM ENTRY | |
| Host Biblionumber | 12374 |
| Host Itemnumber | 16462 |
| Place, publisher, and date of publication | Sage, |
| Title | Perception |
| International Standard Serial Number | 1468-4233 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | https://doi.org/10.1177/0301006619847590 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | Articles |
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| 650 ## - Subject | |
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| 700 ## - Added Entry Personal Name | |
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| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| -- | ddc |
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