what is an emotion?gratch/csci534/old-lectures/lecture2-20… · 1 what is an emotion? • the...
TRANSCRIPT
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1
What is an emotion?
• The recognition of a change of feeling
• God’s punishment for disobedience -- St Augistine
• A brain process that computes the value of an experience --- Le Doux
• A word we assign to certain configuration of bodily states, thoughts, and
situational factors – Feldman Barrett.
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2
What is emotion NOT?
From Scherer
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3
Do emotion’s “exist”?
• Are emotions “natural kinds”
– Are they reflected in the structure of nature or are they concepts
we impose on a lose collection of related structures
• Basic/Discrete emotion view (e.g. Ekman, Le Doux…)
– Some of what we call emotions correspond to brain circuits • Joy, Hope, Rfear, (Joy, Hope, Fear, Sadness, Anger, Disgust)
– Distinguished from more complex affective states
• Love, optimism, awe, remorse, shame
E.g. Le Doux fear
circuit
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Do emotion’s “exist”?
• Core Affect View (Russell, Feldman Barrett)
– Emotions don’t exist as discrete circuits
– Emotions correspond differences in body state distinguished in
terms of broad dimensions (e.g., valence and arousal)
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What is an emotion?
• Component view
– episode of massive synchronized recruitment of mental and
somatic resources allowing to adapt to cope with stimulus event
subjective appraised as being highly pertinent to needs, goals,
and values of the individual. -- Klaus Scherer
• Components
– Cognitive elements: Goals, needs, values / Subjective appraisal
– Somatic elements: Physiological activation / Display / Action
tendency
– Feelings: some authors distinguish these cognition
• Prototypical characteristics
– High intensity
– Synchronization across components
– Adaptive / Coping
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Appraisal Theory
Affective Computing: Lecture 2
Stacy Marsella
Jon Gratch
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Emotion
CognitiveEmotion is a mental phenomena
• Arises from physiological & cognitive processes
• Associated with key cognitive functions– Focusing mental, sensory resources
– Influencing beliefs
– Informing decision-making
– Preparing action and reaction
– Learning and long-term adaptation
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Emotion
Emotion is a physical phenomenon
• Emotion processes associated with specific
physical behaviors
– Facial expression
– Body language and posture
– Voice
– Behavioral dynamics
Cognitive
Physical
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Emotion
Emotion is a social phenomenon
Emotion is a signal that influences the
behavior of others
– Emotional contagion
– Social referencingPhysical
Social
Cognitive
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Why our we interested in modeling emotion?
Goal is to develop unified computational framework for modeling, simulating, explaining and exploiting these phenomena
• To inform intelligent system design
– By drawing on insights from emotion’s cognitive/social function
– Simon, 1968; Minsky; Scheutz, &Sloman, 2001
• To inform emotion theory
– By concretizing theory and developing methodological tools
• To drive applications
– Education, Training and Health Interventions
Cognitive
Physical
Social
Unifie
d U
nd
ers
tan
din
g
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– Application Areas:
– Social Learning Environments
– Gratch&Marsella04; Diaz04 ….
– User modeling
– Infer student motivational state (Conati&MacLaren , 2004)
– Entertainment
– “Creating Emotion in Games”
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Social Learning Environments
Explore emotionally charged social
interactions in safety of VR
Virtual Role Play
Learner interacts with Virtual
Humans
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Virtual Humans
• Interact with users– Computer-generated simulations of humans
– Play role of mentors, peers, competitors, etc.
• Communicate thru speech and gesture– Coordinated gestures and non-verbal
communication
• Reason about environment– Behavior not pre-scripted
– Reason about possible responses to events
• Understand & express emotions– Affects way they perform tasks & interact socially
– Affects gaze, face, gestures, posture
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ICT Movie
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Health Interventions •Mental health (Marsellaet al)
• Autism (Tartaro&Cassell)
Diagnosis & Assessment•ADHD Assessment (Rizzo et. al)
Education and Training•Intelligent tutoring systems (Lester et al; Graesser)• Health care provider training (Lok et al)
Virtual Human Applications
Entertainment• Façade (Mateas and Stern)
Informal Science Education•Museum Guides (Boston Science Museum, Cooper-Hewett)
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Theoretical Issues
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Theoretical Views
Categorical vs dimensional – Categorical
Tomkin’s 8: fear, anger, anguish, joy, disgust, surpass, interest and shame
Ekman’s six basic emotions
– Culturally universal
– Dimensional: Russell’s circumplex: Arousal & Valence (Pleasure)
Russell &Mehrabian’s PAD model: Pleasure, Arousal & Dominance
– Appraisal Theories
Utility for computational work?– Virtual Humans, Behavior animation, Speech
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Theoretical Views (cont)
Function of Emotion– Stress on Social Coordination
E.g., Parkinson
– Stress on Individual Regulation and Adaptation
E.g., Lazarus
Function of Emotional Expression– Social Signal
– Reflection of internal state
– Part of adaptive behavior
Example: Eyelid and eyebrow lift
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Theoretical Issues (cont):
Top down– Emotion arises from cognitive processes
– Appraisal Theories Stimulus > Cognition/Appraisal > feeling
Bottom up– Physiological and perceptual processes drive
– Zajonc Stimulus > unconscious affect > feeling
– James Stimulus > response > feedback > feeling
Pathways go both ways– May differ for different emotions
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Dimensional
Appraisal
Models
ARElliott EM
Neal Reilly
FLAMEEl Nasr
EmileGratch
CBIMarsella
Lazarus
EMAGratch/Marsella
FearNot!Dias
NAFOMarinier
CathexisVelásquez
Frijda
Armony
Scheultz
Mehrabian ALMAGebhard
MAXBecker
MAMIDHudlicka
ACRESSwagerman
OCC
WillMoffat
Sloman
Neuro/Ethology
(e.g., LeDoux,
Damasio)
Cognitive
Architecture
PerspectiveHOTCO
Thagard
NML1Beaudoin
Minder1Wright
Alvila-Garcia,
Canamero
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Diagram comments
• Draw on Different Theories– Grounded in different experimental techniques
– Appraisal Theories dominant
• Creating models from particular theories versus pulling from different theories
• Models of specific affective phenomena versus more general models
• Built for different Applications
• Different computational techniques
• Lineage
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Modeling the cognitive antecedents and
consequences of emotion
Cognitive
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• Top down theories– Cognition influences emotion
– Appraisal Theory (Arnold, Lazarus, Frijda, Scherer, Ortony et al.)
Emotion arises from an evolving subjective interpretation of person’s relation to their environment and informs cognitive and physical acts
Magda Arnold
Theories of cognitive emotion
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(act on world) (act on beliefs)
Appraisal Variables
CopingStrategy
ActionTendencies
“Affect”Physiological
Response
Appraisal
Coping
Smith and Lazarus91 cognitive-motivational-emotive system
Problem-Focused Emotion-Focused
EnvironmentGoals/Beliefs/
Intentions
Desirability
Expectedness
Controllability
Causal Attribution
Appraisal Theory
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(act on world) (act on beliefs)
Appraisal VariablesAction
Tendencies“Affect”
PhysiologicalResponse
Appraisal
Problem-Focused Emotion-Focused
EnvironmentGoals/Beliefs/
Intentions
Desirability
Expectedness
Controllability
Causal Attribution
Take action
Seek support
Form/drop goal
Form/drop belief
Form/drop intention
Coping
Smith and Lazarus91 cognitive-motivational-emotive system
Appraisal Theory
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Appraisal
Appraisal
• Appraisal = Situation assessment
– Compare beliefs, desires and intentions
with
external circumstances
Internal
goals, beliefs
External
World Appraisal
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Appraisal
• Characterize via appraisal variables– Desirability
• Does this event help/hurt my goals
– Likelihood
• How likely is it that this event will occur
– Unexpectedness
• Was this event expected
– Causal attribution (causality, agency, blame/credit)
• Who deserves blame for causing the event
– Coping potential (controllability, adaptability)
• What chance do I have for dealing with this event
– Urgency
• Superset of criteria considered by intelligent systems
– Decision theory: desirability, likelihood
– Scheduling: desirability, urgency
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Appraisal
• Emotions defined in terms of
configurations of appraisal variables
– Undesirable, Uncertain Fear
– Desirable, Certain Joy
– Undesirable, Caused-by(Other) Anger-at(Other)
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Problem-
focusedEmotion-
focused
• Coping = Response strategy
– Characterized by ontology of coping
strategies
Emotion
Coping Strategies
Appraisal
AppraisalCoping
Internal
goals, beliefs
External
World
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• Problem-focused (act on the world)
– Action execution
– Planning
– Seek instrumental social support
• Analogous to:– Deliberative or reactive problem solving
– Team negotiation
Coping Strategies
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• Emotion-focused (act on belief)– Denial
– Find positive meaning
– Resignation
– Shift blame
– Distancing
• Not typically considered by intelligent systems– More than a decision (e.g. abandon current plan)
• Provides self-justification for why
• Related to motivational / explanatory coherence
• Leads to persistent change in behavior
• Helps find ecological niche
Coping Strategies
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Appraisal Theory as
architectural specification
• Provides high-level requirements
• How do we map this into an architecture – How do we represent the person-environment relation?
– How do appraisal processes operate over this representation?
– What is the relation between the processes of
• Appraisal
• Cognition
• Coping
– How do these interactions interact/unfold over time?
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EMAGratch & Marsella
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Planning Perception Dialogue Action
Causal Interpretation:
Working memory of plans, beliefs, desires, intentions
Cognitive Operations (inference)
Past Events Future PlansPresent
EMA Model of Appraisal and CopingCognition as multiagent planning/envisionment
Future ActCause: self
Intend: yes
Probability: 50%
GoalUtility: 50
Probability: 50%Intend-that: True
Goal
Utility: 50 Probability: 100%
Belief: FalsePast ActCause: Other
Intend: yes
Prob: 100%Facilitates
Inhibits
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Future ActCause: self
Intend: yes
Probability: 50%
GoalUtility: 50
Probability: 50%Intend-that: True
Past Present Future
Goal
Utility: 50 Probability: 100%
Belief: False
Past ActCause: Other
Intend: yes
Prob: 100%
ChallengeDesirability: 50
Likelihood: 50%
Causal Attribution: self
Coping Potential: Moderate
Emotion: Hope(25)
ThreatDesirability: -50
Likelihood: 100%
Causal Attribution: Other
Coping Potential: moderate
Emotion: Anger(50)
FacilitatesInhibits
Appraisal
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ThreatDesirability: -100
Likelihood: 50%
Causal Attribution: Other
Coping Potential: Low
Emotion: Sadness(50)
Past Present Future
Goal
Utility: 50 Probability: 100%
Belief: False
Past ActCause: Other
Intend: yes
Prob: 100%
ThreatDesirability: -50
Likelihood: 100%
Causal Attribution: Other
Coping Potential: moderate
Emotion: Anger(50)
Inhibits
Coping
ChallengeDesirability: 50
Likelihood: 50%
Causal Attribution: self
Coping Potential: Moderate
Emotion: Hope(25)
Future ActCause: self
Intend: yes
Probability: 50%
GoalUtility: 100
Probability: 50%Intend-that: True
Facilitates
Resignation
(abandon goal)
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Modeling Appraisal & Coping
• Appraisal as evaluation of the causal interpretation– Define appraisal variables in terms of features of interpretation
– Fast, automatic
• Coping: Operators that suggest ways to change interpretation
– Sequential, deliberate, mediated by focus of attention
– Problem-focused Take Action, Make Plans
– Emotion-focused
• Denial/Wishful Thinking Change belief / likelihood
• Find silver lining Change utilities
• Shift blame Change causal attribution
(socially) Dialogue moves
• Distancing/acceptance Drop goal / intention
• Avoidance Change topic
Add goal (e.g., go to party)
Key: A “Content” & “Process” Model
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Example: Modeling Naturalistic Emotion
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Surprise Fear Anger
Empathy Humor/Relief
Emotional Dynamics
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Relevance
Implication
Coping
Potential
Normative
Significance
“Working Memory”Environment
Control Signals
Appraisal
Frames
Affective
State
Appraisal
Coping
Inference Action
Appraisal
Scherer’s Sequential Checking Model EMA
Collaboration with Klaus Scherer’s Geneva Emotion Group
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Relevance
Implication
Coping
Potential
Normative
Significance
“Working Memory”Environment
Control Signals
Appraisal
Frames
Affective
State
Appraisal
Coping
Inference Action
Appraisal
Scherer’s Sequential Checking Model EMA
Dynamics in
the world
Marsella & Gratch, JCSR 2008
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Relevance
Implication
Coping
Potential
Normative
Significance
“Working Memory”Environment
Control Signals
Appraisal
Frames
Affective
State
Appraisal
Coping
Inference Action
Appraisal
Scherer’s Sequential Checking Model
Dynamics in
the world
Dynamics in perceived
world relationship
Marsella & Gratch, JCSR 2008
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Relevance
Implication
Coping
Potential
Normative
Significance
“Working Memory”Environment
Control Signals
Appraisal
Frames
Affective
State
Appraisal
Coping
Inference Action
Appraisal
Scherer’s Sequential Checking Model
Dynamics in
the world
Dynamics in perceived
world relationship
Dynamics
through action
Marsella & Gratch, JCSR 2008
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Bird Flies InPersonal HealthDesire: Self (100)
Satisfied: TrueProbability: 80%
Surprise
Perspective: Self
Unexpectedness: High
Controllability: Low
Blame/Credit: unresolved
Ap
pra
isal
Virtual Actor’s Appraisal of Bird Flying in Window
Seek
Info
Coping: Seek More Information
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Bird Attack
Responsibility: Bird
Bird Flies In Personal HealthDesire: Self (100)Satisfied: FalseProbability: 60%
Fear: 48
Further Inference: The Bird will attack
Perspective: Self
Desirability: Undesirable
Controllability: Low
Blame/Credit: Bird
Ap
pra
isal
Threatens
Move Away
Avoid
Threat
Coping: Avoid
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Bird Attacking
Responsibility: Bird
Bird Flies In
Personal HealthDesire: Self (100)Satisfied: FalseProbability: 50%
Anger: 48
Re-Appraisal & Further Planning
Perspective: Self
Desirability: Undesirable
Controllability: Medium
Blame/Credit: Bird
Ap
pra
isal
Threatens
Attack Threat
Whack Bird
Coping: Plan
Threatens
Bird at safer dx
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Control Signals
Causal Interpretation(Goals, Beliefs, Causal Relations, Plans, Intentions)
Environment
AppraisalFrames
AffectiveState
Appraisal
Coping
Plan
Inference
Belief
Formation
Explanation
Action
Dialogue
Emotion as Meta-control system
Dynamics a function of coping/cognitive processes and evolving situation
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48
This is the Seeley G. Mudd
Psychology building
How many minutes will it
take to climb the stairwell
to the top?
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49
Mood induction
• Experimental manipulations can impact a person’s mood
– Happy/Sad Music
– Imagined situations
– Movies
– Weather
• These manipulations seem to impact unrelated decisions
– Sad music will make hills seem higher, math problems harder
– Performing experiment in disgusting room will increase sense
of moral outrage
– This has been called the “Misattribution” of emotion (Clore)
• People use feelings to inform whatever decision is in mind
– Cognitive heuristic?
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50
Views on the influence between emotion and cognition
Elicitor
(e.g. Appraisal)
causes
Cognitive/Behavioral
Changes
Appraisal
Emotion
causes
Cog/Behav
Changes
Brain/Body
Configuration
causes
Feeling
Other factors Appraisal Other factorscauses
Cog Changes
Direct Influence Emotion as Mediator Emotion as Information
(Affect as information)
Zajonc