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a collaborative knowledge base characterizing the state of current thought in Cognitive Science.
a database of photographs used in emotion research.
Definition contributed by BGregory about seven years ago

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International Affective Picture System has been asserted to measure the following CONCEPTS

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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).

User Discussion

"Initial definition retrieved from"
NPicchetti (about seven years ago)

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