Related Experiment Video
Updated: Jun 18, 2026
06:30
Complete and Partial Resuscitative Endovascular Balloon Occlusion of the Aorta for Hemorrhagic Shock
Published on: May 19, 2022
Amodal completion is not completed only behind the occluder
Midori Takashima1, Teruo Fujii, Ken Shiina
1Department of Psychology, Chuo University, 742-1 Higashinakano, Hachioji-shi, Tokyo 192-0393, Japan. jade@tamacc.chuo.u.ac.jp
Perception
|November 17, 2009
Summary
This study shows how figure orientation and shape influence amodal completion, a visual perception phenomenon. Symmetrical shapes are perceived with vertical orientations, while smooth continuity is seen in diagonal orientations.
Area of Science:
- Cognitive Psychology
- Visual Perception
Background:
- Amodal completion is a key aspect of visual perception, allowing the brain to infer unseen parts of objects.
- Previous research by Markovich (2002) highlighted the roles of symmetry and smooth continuity in this process.
Purpose of the Study:
- To investigate how figure orientation and the shapes of occluding/occluded figures affect amodal completion.
- To determine the influence of visible contour and contextual relations on amodal completion.
Main Methods:
- Presented figures in various orientations (vertical, horizontal, diagonal).
- Modified the shape of the occluded figure's exposed side (straight vs. curved).
- Altered the occluder's shape (disk, half-disk, quarter-disk).
Main Results:
- Confirmed Markovich's findings on amodal completion via smooth continuity and symmetry.
- Orientation influenced perception: vertical axes favored symmetry, diagonal axes favored smooth continuity.
- Visible contour and the overall figure context significantly impacted amodal completion.
Conclusions:
- Figure orientation and shape are critical factors in amodal completion.
- The contextual relationship of the entire figure is significant for accurate visual inference.
Related Concept Videos
01:12Visual Agnosia
Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...
02:07Blind Procedures
Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which child was...
01:19Masking and Demasking Agents
EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on the metal...
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on the metal...
01:28Angle Closure Glaucoma: Treatment
Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
01:20Spanning Openings in Brick Walls
In brick wall construction, supporting structures are crucial for openings like windows and doors to maintain the integrity and support the weight of the wall above. These supports include lintels, corbels, and arches, each serving specific structural purposes.
Lintels are primary supports used to span openings and can be crafted from materials such as reinforced concrete, steel-reinforced brick masonry, or simple steel angles. These are straightforward to install and are typically concealed...
Lintels are primary supports used to span openings and can be crafted from materials such as reinforced concrete, steel-reinforced brick masonry, or simple steel angles. These are straightforward to install and are typically concealed...
01:19Limits with Oscillating Discontinuities
An oscillating discontinuity is a type of discontinuity in which a function’s values fluctuate infinitely often as the input approaches a particular point. Unlike jump discontinuities, where the function suddenly shifts between two values, or infinite discontinuities, where the function diverges without bound, an oscillating discontinuity arises from rapid back-and-forth variation. Because the function never stabilizes toward a single value, no finite limit exists at that point.One of the most...