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The Self-Assessment Manikin (SAM) is a non-verbal pictorial assessment measuring the pleasure, arousal, and dominance associated with a person's affective reaction to stimuli.
Bradley, M. & Lang, P.J. (1994). Measuring Emotion: The Self-Assessment Manikin and The Semantic
Differential. J. Behav. Ther. Exp. Psychiat, 25, 49-59.