The Effect of Optical Flow Motion Direction on Vection Strength
In some phenomena of visual perception, the motion direction of visual stimuli can affect perception. In particular, asymmetries between oblique directions and cardinal (horizontal and vertical) directions have been reported and are known as oblique effects (e.g., contrast sensitivity and motion thr...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2020-01-01
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| Series: | i-Perception |
| Online Access: | https://doi.org/10.1177/2041669519899108 |
| _version_ | 1818279039128829952 |
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| author | Yoshitaka Fujii Takeharu Seno |
| author_facet | Yoshitaka Fujii Takeharu Seno |
| author_sort | Yoshitaka Fujii |
| collection | DOAJ |
| description | In some phenomena of visual perception, the motion direction of visual stimuli can affect perception. In particular, asymmetries between oblique directions and cardinal (horizontal and vertical) directions have been reported and are known as oblique effects (e.g., contrast sensitivity and motion threshold). In this study, we investigated how vection strength depends on motion direction. Participants observed random-dot optical flow in a circular field and rated the perceived vection strength. Dot movement was systematically controlled using the following angles: 0° (up), 30°, 45°, 60°, 90°, 120°, 135°, 150°, and 180° (down). We found that vection strength depended on motion direction and was weaker in the oblique directions than cardinal directions. Thus, the effect of motion direction on vection strength was variable, as seen in the shape of the oblique effect. |
| first_indexed | 2024-12-12T23:26:59Z |
| format | Article |
| id | doaj.art-04bf9adcd84847008a3c3222fdaaa478 |
| institution | Directory Open Access Journal |
| issn | 2041-6695 |
| language | English |
| last_indexed | 2024-12-12T23:26:59Z |
| publishDate | 2020-01-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | i-Perception |
| spelling | doaj.art-04bf9adcd84847008a3c3222fdaaa4782022-12-22T00:07:59ZengSAGE Publishingi-Perception2041-66952020-01-011110.1177/2041669519899108The Effect of Optical Flow Motion Direction on Vection StrengthYoshitaka FujiiTakeharu SenoIn some phenomena of visual perception, the motion direction of visual stimuli can affect perception. In particular, asymmetries between oblique directions and cardinal (horizontal and vertical) directions have been reported and are known as oblique effects (e.g., contrast sensitivity and motion threshold). In this study, we investigated how vection strength depends on motion direction. Participants observed random-dot optical flow in a circular field and rated the perceived vection strength. Dot movement was systematically controlled using the following angles: 0° (up), 30°, 45°, 60°, 90°, 120°, 135°, 150°, and 180° (down). We found that vection strength depended on motion direction and was weaker in the oblique directions than cardinal directions. Thus, the effect of motion direction on vection strength was variable, as seen in the shape of the oblique effect.https://doi.org/10.1177/2041669519899108 |
| spellingShingle | Yoshitaka Fujii Takeharu Seno The Effect of Optical Flow Motion Direction on Vection Strength i-Perception |
| title | The Effect of Optical Flow Motion Direction on Vection Strength |
| title_full | The Effect of Optical Flow Motion Direction on Vection Strength |
| title_fullStr | The Effect of Optical Flow Motion Direction on Vection Strength |
| title_full_unstemmed | The Effect of Optical Flow Motion Direction on Vection Strength |
| title_short | The Effect of Optical Flow Motion Direction on Vection Strength |
| title_sort | effect of optical flow motion direction on vection strength |
| url | https://doi.org/10.1177/2041669519899108 |
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