Introduction to Cognitive...
Transcript of Introduction to Cognitive...
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Introduction to Cognitive ethology
2018
Ádám MiklósiDept. of Ethology
Eötvös Loránd University, [email protected]
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Literature
This lecture series is based on
Shettleworth, S. J. 2010 Cognition, evolution and behaviour
(2nd edition) Oxford University Press
Pages where you find background information to these topics:
•CH 1, 2: 1-53 Introduction
•CH 4: 96-119 Learning
•CH 8: 261-283; 296-310 Spatial Cognition
•CH 12: 417-455 Social cognition
•CH 13: 466-497 Social learning
•CH 14: 508-546 Communication
You DON NOT have to know/learn all of this, check by means of
the ppt files which parts of the chapters are relevant
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Why do we study animals?
1. Understanding the biology of animal behaviour (evolution, genetics, physiology, cognition)
2. Understanding human behaviour3. Practical reasons (welfare, agriculture)
Ethological research has significant effect on people’s perceptions of animals
Movies, television, shows, books, magazines
Ethology is the biological study of animal and human behaviour in the natural environment (Tinbergen 1953)
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Concept 1: Darwinian Evolution
1. Large reproductive potential in populations
2. Fixed amount of resources3. Individuals compete for
resources (fitness = offspring)4. There is an individual variation5. Individual traits can be
inherited(Darwin: Origin of the species)
Natural selection: Change in the characteristics of organisms over time („continuity”)
Levels (unit) of selection: gene, individual, kin
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Concept 1: Darwinian Evolution
Adaptation: Is it a circular argument?Just so stories?
Can we detect and measure adaptation?
Sources of variation: Mutation and recombination
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Distinguishing „adaptation” from „adaptive”
Gould and Vrba (1982):
Adaptation: specific evolutionary change as a response to a specific environmental parameter
Exaptation: earlier adaptation new functionnon-adaptation („by product”) new function
Adaptation has a functionExaptation has an effect
E.g. skull suturesAdaptation to birth in mammals? BUT: birds and reptiles have it also
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Concept 1: Evolution and environment
Analogy - convergence: shared function
Homology: common origin
e.g. vertebrate limbs
Femur – tight bone
Tibia - shinbone
Tarsals
Human leg
Insect leg
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Concept 1: Evolution and environment
A BA B’Paralellisms
A B A’Reversal
A BDivergence
A C
A B CDivergence
AC
C1B
HomologyConvergence
A, B, C = traits
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Concept 2: Genetics and Environment
Genetic vs environmental determinismJohn Watson said, "Give me a dozen healthy infants, well-formed, and my own specified world to bring them up in and I'll guarantee to take any one at random and train him to become any type of specialist I might select...regardless of his talents, penchants, tendencies, abilities, vocations and race of his ancestors”.
Genetic basis of behaviour:„One gene – one feature….”
„Innate versus learnt” („nature” versus „nurture”) debate
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Concept 2: Genetics and Environment
Epigenesis: Dynamic two-way interaction between genes and environmental factors in time
Genetically programmed behaviour„closed” and „open” programs (Mayr)
Waddington:
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EpigenezisInherited factors learned factors
„specialist” „generalist”
E.g. development of the cat visual system(Hubel and Wiesel)
koala rat
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Epigenetic field: The emergence of individuality
Temperament: genetic factors with strong effect
Personality: epigenesis of temperament;interaction with the stable components of the local environment;„personality traits”
Individuality: personality and own experience
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Concept 3: EthologyBiological basis of natural behavior
Data from describing the behavior in „action units”
Ethogram (catalogue of behaviour units)
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Concept 3: Psychology and Ethology
Design of experiments: psychological traditionStudy of learning (anthropocentrism)
1. Thorndike (1911) trial and error learning
2. Watson (1930) behaviorism
3. Skinner (1938) operant learning (S-R connection); Sherrington(1906); Pavlov (1927) reflextheory
4. Tolman (1948): „cognitive maps”
„Cognitive revolution”
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Concept 3: Ethology and psychology
Observation of behavior: ethological traditionStudy of „innate” behavior
1. Whitman (1919), Heinroth (1910): description of behavior
2. Lorenz (1978): evolutionary origin
3. Tinbergen (1963): environmental effects, ecology
4. von Frisch (1973) communication experimental approach
5. Griffin (1976), Shettleworth(1991): cognitive approach to behavior
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Concept 3: Psychology and Ethology
Toward a unified science of „behavioural biology”
Ethology, evolutionary biology, ecologyPsychology, cognitive psychology
„evolutionary psychology” „cognitive ethology”
Biological study of the mind
Humanethology, sociobiology
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Classic concepts of behavior
The problem of instinct…
Fixed action pattern (FAP) – Modal action pattern (MAP) All member of the species display it (species
specific) „Not learned” but environmental modification Fixed order of units Can occur without environmental releasers Fast habituation
Sign stimulus: Environmental stimulus which releases an action pattern Simplified signal, filtering mechanism
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An example: Territorial aggression
In the robin (Erithacus rubecula) in the stickleback (Gasterosteus aculeatus)
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Predatory behavior in the common toad (Bufo bufo)
Units of predatory behavior:1. Orientation2. Stalking3. Fixation4. Catching5. Swallowing6. Wiping
Fixed action pattern
Parallel with body axisElongated moving object
Sign stimulus
„worm, antiworm”
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Egg retrieval of the greylag goose
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Laughs and smiles
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Concept 3: Ethology
Tinbergen’s 4 questions:
Ultimate:Why are they doing it? FUNCTION
Why did it EVOLVE (history)?
Proximate:How are they doing it? MECHANISM
How does it DEVELOP?
Why do (some) birds sing?
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An example: On the function of birdsong
Hypothesis:The „quality” or „quantity” of
singing influence pair choice
PredictionLarger repertoire, better territory
(more food for the offspring)Larger repertoire, more offspring
Experiments:1. Relationship between food
quality and song quality 2. Relationship between fitness
and song repertoire
Why do tits sing?
Great tit(Parus major)
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Learning
Evolution of bird song
Parrots
Hummingbirds
SongbirdsIndependent evolution ??
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How do birds sing? Mechanism and development
Lack of environmental input
Species specific difference
Lack of input from „self” (faulty sensory-motor learning)
Sensitive period
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How do birds sing? Mechanism and development
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Concept 4: Modeling
Difference between „replica/copy” and „model”
Scientific model: Simplified description of the phenomenon
Descriptive modelsPredictive models
DNA
„Perpetum mobile” Watermill
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What happens „inside” the skull?
Metaphors:Clockwork, switchboard, computer, internet ….
Structural – hardware – genetics/neurons
Environmental – software – „cognitions”/states
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Concepts 4: Modeling
Mental representations are functioning isomorphisms between brain and environment (Galistell, 1990)
Processing of limited information
Simplified representation of the environment
Updating and prediction
Associations versus representations(structure/development)
Making models of models (= representations)
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Classic ethological models of behavior
Action specific energy
Behavior (FAP) Sign stimulus
Lorenz: Psychohydraulic model
spring
„weight”
„water”
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Classic ethological models of behavior
Light, temp.
territory
bite
intruder
Reproductive behaviour
Territorial behavior
Aggressive behavior
Bite
Tinbergen: Hierarchical model
Foraging
Courtship
Eating
Display Head up
Inhibitory connections
Behaviour organisation in robots
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Mental model for predator avoidance in paradise fish (Csányi 1990)
Fear, pain Sign stimulus
recognition memory
Exploration
Species specificBehaviore.g. escape
Mental model of the environment
Feedback model (interactive) of antipredator learning
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Models of behaviour
Analytic (descriptive) models vs synthetic models
Validation of behaviour
Parallels: ‚in vivo’ vs ‚in vitro’
Rapid climbing by using an active tail (Jusufi et al 2008 PNAS)
Verification of the mechanism
Functional analysis (is the tail important?)
Climbing in geckos
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Behaviour systemsTimberlake 1994
System-subsystem-motivational mode – perceptual motor modul
Shettleworth 2010
Sh96-134
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Concept 4: Cognitive ethology
Darwin (1872): the evolutionary question of mental continuity
Donald Griffin (1976): ‘The question of animal awareness’ (consciousness)
Interference of mental states from behaviour
The relationship between „behaviour” and „mental state”
Signs of „thinking”?, e.g.
Mental representation of objects Categorisation Representing the other’s mental state
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Cognitive ethology – General issues from philosophy
AnthropomorphismAnecdotes vs experimentsThe deceiving cat: A cat in the armchair....
‚Critical anthropomorphism’ (Burghardt)
Byrne and Bates (2008): (human) ‘cognition’ as a hypothesis generating tool
Reduce influence of human species-specific concepts Reduce influence on data collection
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Cognitive ethology – General issues from philosophy
The simpler the better (?)
„Law of parsimony”„Ockham’s razor”
Lloyd Morgan’s canon (1896): always(?) choose the most simple explanationEinstein (?): „Everything should be made as simple as possible, but not simpler” (to what should we reduce an explanation)
„simple”- associative learning… but „cognitive theory”
Hypothesis testing