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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).
"Initial definition retrieved from the BrainMapLex.xls file located in the documentation section of: http://brainmap.org/scribe/index.html"
NPicchetti (about seven years ago)
Definition contributed by BGregory about seven years ago:Subjects view arrows presented in the right or left visual field that were pointing to the left or right. Subjects respond via button press as to the direction of the arrow. In incongruent stimuli, left-pointing arrows are seen on the right side, and vice versa. (from the BrainMapLex.xls file located in the documentation section of: http://brainmap.org/scribe/index.html)REVISION 1
Definition contributed by SAdministrator about eight years ago:No definition submitted yetView Term Event Log