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Continuity and Change in Cognitive Development
Lecture 36
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Development as Quantitative ChangeThe Child as “Short, Stupid Adult”
• Training Studies (Gesell & Thompson, 1929)
– Twin Girls: “T” & “C”– Length of Training
• Hopi Cradleboards (Dennis, 1940)
– Swaddled for first year of life– Age of Walking (by 18 mos.)– Lesions in Occipital Bone Kiowa baby in a cradle board.
Charles H. Stephens Collection, University of Pennsylvania Museum of Archaeology and Anthropology
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Gesell Developmental SchedulesGesell (1940)
• Motor• Adaptive• Language• Personal-Social
2.0y: Runs Well, No FallingWalks Up and Down Stairs
2.5y: Tries to Stand on 1 Foot3.0y: Walks on Tiptoe, >2 Steps3.5y: Stands on 1 Foot >2 secs
Jumps, Both Feet Leave Floor4.0y Stands on 1 Foot 2-7 secs
Walks Down Stairs4.5y: Hops on 1 Foot5.0y: Stands on 1 Foot >9 secs5.5y: Stands on 1 Foot 12 secs6.0y: Stands on 1 Foot Alternately
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The Growth of Intelligence
• Binet & Simon (1905): Mental Age– Correlated with Chronological Age
• Test Items Clustered by Age Level
• Terman (1916): IQ – “Ratio” IQ = MA/CA x 100
• Wechsler (1936)– “Deviation” IQ
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The Origins of Knowledge
• Nativism (Descartes)– Innate Knowledge
• Independent of Sensory Experience
• Empiricism (Locke)– Knowledge Acquired Through Experience– Child as a Tabula Rasa
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Qualitative Stages of Intellectual Development
Piaget (1951, 1952)
• Schema• Assimilation and Accommodation• Stages of Cognitive Development
– Sensory-Motor Intelligence– Pre-Operational Thought– Concrete Operations– Formal Operations
• Landmarks of Stages
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Sensory-Motor IntelligenceBirth to Age 2
• Unrelated Sensory Experiences“A Blooming, Buzzing Confusion”
William James
• Reflex-Like Motor Responses• Sensory-Motor Schemata
• Failure of Object Permanence
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The Pre-Operational PeriodAge 2-7
• Object Permanence• Unrelated Internal Representations• Conservation Failure
• Egocentrism
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The “Three Mountains” TaskPiaget & Inhelder (1956/1967)
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Age and EgocentrismBrodzinsky (1980)
012345678
4 6 8 10
Mea
n Sc
ore
Age
Correct Egocentric
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Concrete OperationsAge 7-12
• Achievement of Conservation– Take Account of Transformations
• Loss of Egocentrism– Take Another’s Point of View
• Attention – Not Controlled by Salience
• Classification by Shared Properties– Hierarchical Structure
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Formal OperationsAge 12 and Up
• Hypothetico-Deductive Reasoning– From General Principles to Specific Instances– The Child as “Naïve Scientist”
• Inductive Reasoning– From Specific Instances to General Principles
• Reflective Abstraction– Reflect on Own Thoughts
• Propositional Logic– If P Then Q
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Other Stage Theories of Development
Sigmund Freud: Psychosexual Development
1. Oral2. Anal3. Phallic4. Latency Period5. Genital
Erik Erikson: “Eight Ages of Man”
1. Trust vs. Mistrust2. Autonomy vs. Shame3. Initiative vs. Guilt4. Industry vs. Inferiority5. Identity vs. Role Confusion6. Intimacy vs. Isolation7. Generativity vs. Stagnation8. Ego integrity vs. Despair9. Despair vs. Hope, Faith (?)
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Stages of Moral DevelopmentLawrence Kohlberg
• Pre-Conventional– Obedience and Punishment– Self-Interest
• Conventional– Interpersonal Accord and Conformity– Authority and Obedience
• Post-Conventional– Social Contract– Universal Ethical Principles– Transcendental Morality (?)
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Critique of the Piagetian Stages
• Decalage– Not a Quantum Shift?
• “Lower Boundaries” of Stages– How Low Can you Go?
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“Counting Principles”in Pre-Operational Children
Gelman & Gallistel (1978)
• One-to-One Correspondence• Stable Order• Cardinality
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“Blitz”
25
“Blatz”
33
“Bluck”
48
“Blit”
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Infant ArithmeticWynn (1992)
• 4-5 month-old Infants• Looking Time
– Measure of Attention• Surprise
• Baseline Control– 1 vs. 2 Items
• Arithmetic Test– Add 1+ 1– Subtract 2 – 1
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Looking TimesWynn (1992)
0
2
4
6
8
10
12
14
1 Plus 1 2 Minus 1
1 Item2 Items
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Stage Theories of Development
• Universal• Obligatory• Stereotyped• Irreversible
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Development as theAcquisition of ExpertiseChi, Glaser, & Farr (1988); Bedard & Chi (1992)
• Young Child as Novice– Expertise Acquired Through Learning
• Characteristics of Expert Problem-Solving– Cross-Referencing– Higher-Order Patterns (“Chunks”)
• Expertise vs. Learning– Qualitative Leaps
• Successive Reorganization of Task Performance– Infant not a Blank Slate
• Innate if Rudimentary Cognitive Apparatus
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Development as MetacognitionGleitman, Gleitman, & Shipley (1972); Flavell (1979)
Cognition About Cognition• Monitoring What You Know• Appreciation of Cognitive Processes
– Metalanguage– Metamemory
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Aspects of MetacognitionFlavell (1979)
• Goals or Tasks– Objectives of Cognition
• Actions or Strategies– What Works for a Given Task
• Metacognitive Knowledge– Understanding of Influences on Cognition
• Metacognitive Experiences– Thoughts and Feelings About Cognition
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The Theory of MindPremack & Woodruff (1978)
Wellman (1990)Baron-Cohen (1991, 1995)
The Ability to Impute Mental Statesto Ourselves and Other People
• Knowledge of Our Own Minds– Mental States Separate from Outside World – Can Control Beliefs, Feelings, Desires– Introspection
• Knowledge of Other Minds– Others’ Mental States May Differ from Ours– Others Have Different Experiences– Infer Others’ Beliefs, Feelings, Desires
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“False Belief” Task ExampleAfter Wimmer & Perner (1983)
• Experimenter, Child, and Puppet• Puppet Hides Ball in Oatmeal Container• Puppet Put Away• Experimenter, Child Switch Ball to Box• Puppet Brought Back• Where will it look?
– 3 to 4-Year-Olds: “In the Box”• “Because that’s where it is”
– 4 to 5-Year-Olds: “In the Oatmeal Container”• “Because that’s where he thinks it is”
Gle
itman
(199
9)
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Age and False Belief Test PerformanceWellman et al. (2001)
0
20
40
60
80
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30 40 50 60 70 80 90
% P
assi
ng
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The “Theory Theory”of Cognitive Development
Gopnik & Wellman (1994)Gopnik & Meltzoff (1997)
Gopnik, Meltzoff, & Kuhl (2000)
• Piaget: Child as “Naïve Scientist”– Actively Exploring and Experimenting
• Formulate Hypotheses• Gather Evidence• Revise Hypotheses
• Develop Theories of World– Abstract, Coherent Knowledge Systems
• Predict, Control Events• Interpret and Explain Events
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Theory-Formation as Learning
• Forms of Learning– Learning from Conditional Probabilities
• Classical Conditioning– Learning from Interventions
• Instrumental Conditioning– Observational Learning
• Precept• Example
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The Child is Not a Tabula Rasa
• Innate Theoretical Capacity– Form, Test, Revise Understanding
• “Starting-State” Nativism– “Substantive Innate Theories” of Various Domains
• Actively Engaged in Theory-Testing– Understanding Surprising Events– Generalize from Examples
• Induce Categories from Instances– Test and Revise Understanding