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Cognitive Development in Infancy and Toddlerhood. Piaget’s Theory. Piaget’s Theory: Schemes. Psychological structures Organized ways of making sense of experience Change with age Action-based (motor patterns) at first Later move to a mental (thinking) level. Building Schemes. Adaptation
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Piaget’s Theory: Schemes • Psychological structures • Organized ways of making sense of experience • Change with age • Action-based (motor patterns) at first • Later move to a mental (thinking) level
Building Schemes • Adaptation • Building schemes • Assimilation • Using current schemes to interpret external world • Accommodation • Adjusting old schemes and creating new ones to better fit environment
Using Assimilation and Accommodation • Equilibrium and Disequilibrium • Use assimilation during equilibrium • Disequilibrium prompts accommodation • Organization • Internal rearranging and linking schemes
Sensorimotor Stage • Birth to 2 years • Building schemes through sensory and motor exploration • Circular reactions
感知运动时期的各个阶段 • Substage 1(0-1m) Reflexive Schemes • 反射练习(Exercising Reflexes)
Substage 2 Primary Circular Reactions 基本习惯动作阶段(Developing Schemes)(1-4ms)
Substage 3(4-10ms) Secondary Circular Reactions • 有目的的动作初步形成(智慧动作开始萌芽) (Discovering Procedures) 条件:
Substage 4(9-11ms) Coordination of Secondary Circular Reactions • 目的与手段已经分化 (Intentional Behavior)
Substage 5(11-12个月至1.5岁) Tertiary Circular Reactions • 用[尝试与错误]解决问题(第三级循环阶段) (Novelty and Exploration)
Substage 6 Mental Representations • 有目的的动作形成(Intentional, or goal-directed behavior) • 开始运用表象思维
Object Permanence211 • Understanding that objects continue to exist when out of sight • According to Piaget, develops in Substage 4.
客体概念 客体永久性作业 • 客体永久性 (object permanent)
智慧成就 • 目的手段的分化 因果关系的形成
Mental Representations211 • Internal, mental depictions of objects, people, events, information • Can manipulate with mind • Allow deferred imitation and make-believe play
Follow-up research 2: Deferred Imitation214 • Piaget: Develops about 18 months • Newer research: • Present at 6 weeks – facial imitation • 6 – 9 months – copy actions with objects • 12 – 14 months – imitate rationally • 18 months – imitate intended, but not completed, actions
Evaluation of Sensorimotor Stage216 • Some developments happen at time Piaget described: • Object search, A-not-B, make-believe play • Many appear to happen soon than Piaget thought: • Object permanence, deferred imitation, problem solving by analogy • Some have suggested that infants are born with core knowledge(217) in several domains of thought
Vygotsky’s Sociocultural Theory • Social contexts (other people) contribute to cognitive development • Zone of Proximal Development – tasks child cannot do alone but can learn to do with help227
Individual differences in early mental development229 • Infant intelligence tests • Intelligence quotient, IQ • Developmental quotients, DQs Meaning of Different IQ Scores
Early environment and mental dev. :High Quality HOME Environment231 • Parent emotional and verbal responsiveness • Parental acceptance • Safe physical environment • Appropriate play materials • Parental involvement • Variety, daily stimulation
Early environment and mental dev. :Elements of Developmentally Appropriate Child Care232 • Responsive, interactive, well-trained caregivers • Clean, safe, uncrowded indoor spaces • Appropriate toys, stored within reach • Safe equipment • Low teacher-child ratios • Flexible daily schedule • Warm atmosphere • Parents welcome anytime • Accredited
Early intervention for at-risk infants and toddlers-----IQ Improvement from Early Intervention Programs
Getting Ready to Talk • First speech sounds • Cooing • Babbling • Becoming a communicator • Joint attention239 • Give- and-take • Preverbal gestures
Starting to Talk • First Words • Underextension • Overextension • Two-Word Utterances • Telegraphic Speech • Comprehension versus production
Individual Differences in Language Development241 • Environment • Child Directed Speech(CDS) • Gender • Personality • Language Style • Referential • Expressive • Language Delay