Visual Illusion
Visual Illusion - Related Videos
08:09
The Rubber Hand Illusion
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Reaching for objects, walking without hitting obstacles, landing on a chair as you sit (instead of falling to the floor), these and all our physical actions depend on an ability to perceive our own bodies in space, to know where our limbs are relative to one another and relative to the rest of the world. One way that the human brain encodes this information is called proprioception, the brain relies on its own control and feedback...
06:43
The Crossmodal Congruency Task as a Means to Obtain an Objective Behavioral Measure in the Rubber Hand Illusion Paradigm
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Cited by 22 •
2013
We demonstrate how an objective measure can be employed in the widely employed rubber hand illusion paradigm. This measure is obtained by modifying the well-established crossmodal congruency task. This task allows the investigation of multisensory processes which are critical for modulations of body representations as in the rubber hand illusion.
06:53
Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation
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Cited by 16 •
2017
Here, we describe virtual-hand and virtual-face illusion paradigms that can be used to study body-related self-perception/-representation. They have already been used in various studies to demonstrate that, under specific conditions, a virtual hand or face can be incorporated into one's body representation, suggesting that body representations are rather flexible.
09:49
Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
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Cited by 7 •
2014
It is unclear how top-down signals from the ventral visual stream affect movement. We developed a paradigm to test motor behavior towards a target on a 3D depth inversion illusion. Significant differences are reported in both deliberate, goal-directed movements and automatic actions under illusory and veridical viewing conditions.
09:44
Methods to Test Visual Attention Online
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Cited by 26 •
2015
To replicate laboratory settings, online data collection methods for visual tasks require tight control over stimulus presentation. We outline methods for the use of a web application to collect performance data on two tests of visual attention.
FAQs
Expectations and context guide how the brain interprets incoming visual information. The same retinal signals can therefore contribute to different perceptual experiences when surrounding information, prior knowledge, or assumptions about an object changes. This makes visual illusions useful for examining how perception is shaped by more than the immediate sensory input.
Retinal signals provide information about the visual stimulus, but they do not determine the final experience by themselves. The brain combines these signals with higher-level interpretation, including expectations and contextual information. Comparing the physical stimulus with the resulting perception helps psychologists investigate where sensory encoding ends and perceptual processing begins.
Depth, motion, and brightness require the visual system to interpret patterns rather than simply register isolated signals. When available information is ambiguous or misleading, the brain applies assumptions about how objects and scenes are organized. Illusions involving these properties therefore expose the interpretive processes used to construct a coherent visual experience.
A visual illusion can occur even when sensory information reaches the retina, because perception also depends on interpretation. This distinction separates the registration of visual signals from the brain’s organization and meaning-making processes. In psychology, that separation allows researchers to study how context, prior knowledge, and expectations influence what a person experiences.
Psychologists compare the physical properties or arrangement of a stimulus with what observers report seeing. Differences between the stimulus and the perceptual experience provide evidence about the processes that shape interpretation. This approach helps researchers distinguish sensory encoding from higher-level processing and evaluate models describing how perception is constructed.
Visual illusions show that perception is sensitive to factors beyond the immediate image. Attention can influence which information is selected, while memory and context can supply expectations that affect interpretation. Studying these effects helps psychologists examine how cognitive processes interact with visual input and why the same stimulus may not produce a uniform experience.
Illusion research provides a way to investigate cases in which perception or interpretation is altered. Because these effects expose how the brain combines sensory signals with expectations and context, they can inform psychological research on neurological and clinical conditions. The findings also contribute to broader models of how typical visual perception operates.