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a collaborative knowledge base characterizing the state of current thought in Cognitive Science.
a kind of psychophysical task, participants view a stimulus that can be perceived as oriented and/or moving in more than one way

Definition contributed by Anonymous
Phenotypes associated with ambiguous figure task


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IMPLEMENTATIONS of ambiguous figure task
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EXTERNAL DATASETS for ambiguous figure task
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Experimental conditions are the subsets of an experiment that define the relevant experimental manipulation.


You must specify conditions before you can define contrasts.

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.

BOLD response
reported perceptual switching

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).


Spontaneous local variations in ongoing neural activity bias perceptual decisions.
Hesselmann G, Kell CA, Eger E, Kleinschmidt A
Proceedings of the National Academy of Sciences of the United States of America (Proc Natl Acad Sci U S A)
2008 Aug 5

The Necker cube--an ambiguous figure disambiguated in early visual processing.
Kornmeier J, Bach M
Vision research (Vision Res)
2005 Apr

Why do ambiguous figures reverse?
Rock I, Hall S, Davis J
(Acta Psychol (Amst))
1994 Oct