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Two spheres of different sizes are repeatedly placed in participants' hands, and they are asked to compare the sizes; upon the final presentation these are replaced with identically sized spheres.
Definition contributed by MLewis about five years ago

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Uznadze haptic illusion task has been asserted to measure the following CONCEPTS
as measured by the contrast:

DISORDERS associated with Uznadze haptic illusion task
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IMPLEMENTATIONS of Uznadze haptic illusion task
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EXTERNAL DATASETS for Uznadze haptic illusion task
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Experimental conditions are the subsets of an experiment that define the relevant experimental manipulation.


In the Cognitive Atlas, we define a contrast as any function over experimental conditions. The simplest contrast is the indicator value for a specific condition; more complex contrasts include linear or nonlinear functions of the indicator across different experimental conditions.


An indicator is a specific quantitative or qualitative variable that is recorded for analysis. These may include behavioral variables (such as response time, accuracy, or other measures of performance) or physiological variables (including genetics, psychophysiology, or brain imaging data).

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