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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 CTorgerson about six years ago:A psychometric scale to measure positive and negative affects in individuals, and both as states and traits. Positive affect questions assess to what extent the participant is attentive, interested, alert, excited, enthusiastic, inspired, proud, determined, strong and active. Negative affect questions assess to what extent the participant is distressed, upset, hostile, irritable, scared, afraid, ashamed, guilty, nervous, and jittery. Participants answer questions on a Likert scale where 0=very, 1=slightly or not at all, 2=a little, 3=moderately, 4=quite a bit, and 5=very much. The questionnaire asks whether participants have felt these traits "during the past few weeks" (trait) and "during the past few days" (state).REVISION 1
Definition contributed by ALenartowicz about eight years ago:A psychometric scale to measure positive and negative affects in individuals, and both as states and traits.View Term Event Log