PAD Emotional State Model
The PAD emotional state model is a psychological framework developed by Albert Mehrabian and James A. Russell aimed at describing and quantifying emotional states through three primary dimensions: Pleasure (P), Arousal (A), and Dominance (D). This model is a part of the broader umbrella of dimensional models of emotion, which propose that emotions can be mapped along continuous axes rather than being viewed as discrete categories.
Components of the PAD Model
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Pleasure: This dimension ranges from extreme displeasure to extreme pleasure. It captures the positive-negative evaluation of an emotional experience. For instance, emotions such as joy and happiness score high on the pleasure scale, while emotions like sadness and frustration score low. 
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Arousal: This measures the level of alertness or activation, ranging from sleepiness or calmness to frenzy or excitement. Emotions such as excitement and fear exhibit high arousal, whereas relaxation and boredom are indicative of low arousal. 
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Dominance: This dimension indicates the degree of control or influence an individual feels in a situation, spanning from feelings of submission to feelings of dominance. A feeling of empowerment or control would score high on this scale, while a feeling of powerlessness or submission would score low. 
Application and Significance
The PAD model is applied extensively in various domains such as marketing, affective computing, and animated character development. For instance, in marketing, understanding the emotional responses of consumers can greatly influence product design and advertising strategies. In the realm of affective computing, this model helps in the creation of systems that recognize and respond to human emotions, enhancing human-computer interactions.
Moreover, the model's utility in constructing emotional expressions in animated characters is significant for virtual environments. By mapping emotions onto the PAD dimensions, developers can create more lifelike and emotionally responsive avatars, thereby enriching user experience in simulations and games.
Relation to Other Emotional Models
The PAD emotional state model is often contrasted with theories of basic emotions, which suggest that certain emotions arise from distinct neural pathways. Instead, the PAD model, like other dimensional models, posits that emotions emerge from combinations of core affective dimensions.
One such related model is the Lövheim Cube of Emotion, which similarly conceptualizes emotions within a three-dimensional space but uses different axes related to neurotransmitter levels. Additionally, the theory of constructed emotion by Lisa Feldman Barrett also suggests that emotions are not fixed but are constructed from more basic psychological elements.