Motion Coherence Task
Motion Coherence Task - Related Videos
11:45
Three-Dimensional Kinematic Characterization of an Object Pick-Up Task Using Motion Capture
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2026
This protocol presents a standardized full-body motion capture approach for assessing the object pick-up task, illustrating how distinct movement strategies and compensatory patterns can be quantitatively characterized during this common functional activity.
12:30
Testing Visual Sensitivity to the Speed and Direction of Motion in Lizards
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Cited by 2 •
2006
Testing visual sensitivity in lizards using an operant conditioning paradigm that employs video playback of random-dot kinematograms and computer-generated invertebrates.
11:45
Piaget's Conservation Task and the Influence of Task Demands
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2023
Source: Laboratories of Judith Danovitch and Nicholaus Noles—University of Louisville Jean Piaget was a pioneer in the field of developmental psychology, and his theory of cognitive development is one of the most well-known psychological theories. At the heart of Piaget’s theory is the idea that children’s ways of thinking change over the course of childhood. Piaget provided evidence for these changes by comparing how children of different ages responded to questions and problems that he...
14:33
Event-related Potentials and the Oddball Task
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2023
Source: Laboratories of Jonas T. Kaplan and Sarah I. Gimbel—University of Southern California Given the overwhelming amount of information captured by the sensory organs, it is crucial that the brain is able to prioritize the processing of certain stimuli, to spend less effort on what might not be currently important and to attend to what is. One heuristic the brain uses is to ignore stimuli that are frequent or constant in favor of stimuli that are unexpected or unique. Therefore, rare events...
08:45
Kinematic Analysis Using 3D Motion Capture of Drinking Task in People With and Without Upper-extremity Impairments
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Cited by 65 •
2018
This protocol describes an objective method to evaluate the movement performance and sensorimotor function of the upper extremity applied to individuals with stroke and healthy controls. A standardized test procedure, kinematic analysis and outcome variables for three-dimensional motion capture of drinking task are provided.
FAQs
A coherence threshold indicates how much directional signal is needed before performance becomes reliable. A lower required proportion of coherently moving dots suggests that the participant can extract overall direction from stronger visual noise, whereas a higher requirement indicates greater difficulty under the tested conditions. This measure provides a sensitivity index for visual motion perception rather than simply a raw correct-response count.
Randomly moving dots prevent participants from solving the task by following a single consistently informative element. The observer must combine motion evidence across the display and separate a directional pattern from distracting movement. Varying the coherent proportion makes the task sensitive to sensory integration and attention, because successful direction judgments depend on extracting the overall signal rather than relying on an isolated dot.
Performance links behavior to motion-sensitive brain systems without requiring a direct neural recording. If a participant’s direction judgments change as the coherent proportion changes, the pattern provides behavioral evidence about how visual motion information is processed and integrated. Researchers can use these measures alongside neuroscience comparisons to examine differences across development, neurological conditions, or experimental interventions.
Accuracy and coherence threshold capture related but different aspects of performance. Accuracy describes how often the reported direction is correct at a selected motion composition, while the threshold describes the minimum coherent signal needed for reliable performance. Using either measure, or both when appropriate, helps distinguish performance at a fixed difficulty from overall sensitivity to motion embedded in noise.
A typical procedure varies the proportion of dots moving in one direction while keeping the remaining dots random, then asks the participant to report the perceived direction or make a related discrimination. Across trials, the researcher records responses and relates them to motion coherence. The resulting accuracy pattern or minimum reliable coherence summarizes performance under the tested display conditions.
Researchers should record the participant’s directional responses and the corresponding coherence conditions, so accuracy can be calculated across levels of visual noise. They may then identify the minimum coherence associated with reliable performance. These measures preserve both trial-level behavior and a compact index for group or intervention comparisons, allowing researchers to evaluate visual motion perception under controlled conditions.
Neuroscience studies use the task to compare visual motion processing across development, neurological conditions, and experimental interventions. Group differences can be expressed as changes in accuracy or in the coherence required for reliable judgments. Because the paradigm links a controlled visual manipulation to measurable behavior, it helps evaluate whether an intervention or condition is associated with altered motion perception, sensory integration, or attention.