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Measures the ability to detect emotion intensity. The subject is presented with pairs of faces. The MEDF presents a pair of faces and asks the participant to click the button labeled “This Face” below the face that is showing more emotion (anger, fear, happiness, sadness , or the central button labeled “Equal” if both faces are showing equal emotion. The stimuli are created using software to morph faces into differing intensities of emotion. For example, a 50 morph will be a 50 morph between a neutral face and the same identity expressing the target emotion. There are 36 trials in total, divided into happy, sad, angry, and fearful faces. Of the 36 trials, 4 show no emotional difference. The remaining 32 trials have emotion differentials in increments of 10 ranging from 10 - 60 , distributed more heavily toward 30 and 40 items. Trials are presented in random order, and the test is a forced-choice task with no time limit per trial. After the subject answers one trial, the test automatically moves to the next trial. Response time is recorded for each trial.

Synonyms: MEDF36, Measured EMODIFF, Morphed EMODIFF
Definition contributed by ABonilla about one year ago

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Measured Emotion Differentiation Test has been asserted to measure the following CONCEPTS

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CONDITIONS
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Experimental conditions are the subsets of an experiment that define the relevant experimental manipulation.

CONTRASTS
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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.

INDICATORS
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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).


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