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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).
Definition contributed by DLau about seven years ago:A task where two sets of differently colored superimposed patterns of dots rotate in opposite directions. The participant is asked to pay attention to on set of dots. One of the sets of dots will then move across the screen and the participant must say which direction the dots are moving.View Term Event Log