santrock tls 5_ppt_ch07
TRANSCRIPT
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A Topical Approach to LIFE-SPAN DEVELOPMENT
Chapter Seven:
Information Processing
John W. Santrock
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Information-Processing Approach
• Analyzes the ways people process information about their world– Manipulate information– Monitor it– Create strategies to deal with it– Effectiveness involves attention, memory, thinking
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Simplified Model of Information Processing
Fig. 7.1
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Information-Processing Approach
Mechanisms of ChangeEncoding Mechanism by which
information enters memory
Automaticity Ability to process information with little or no effort
Strategy construction
Discovering new procedure for processing information
Metacognition Cognition about cognition, or “knowing about knowing”
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Information-Processing Approach
• Speed of processing information– Assessed using reaction time tasks
• Changes in speed of processing– Improves dramatically through childhood and
adolescence– Changes due to myelination or experience?– Decline begins in middle adulthood; continues
into late adulthood
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Information-Processing Approach
• Does processing speed matter?– Linked with competence in thinking– For many everyday tasks, speed is unimportant– Efficient strategies can compensate for slower
reaction times and speed– Processing linked to accumulated knowledge and
abilities to perform
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The Relation of Age to Reaction Time
Fig. 7.2
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Attention
• Attention: focusing of mental resources– Four types
• Infancy– First year: orienting/investigative process
• Directs attention to locations (‘where’)• Recognize objects and their features (‘what’)• Attention gains flexibility and speed
– Sustained (focused) attention increases
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Types of Attention
Selective attention
Focusing on specific aspect of experience that is relevant while ignoring others
Divided attention
Concentrating on more than one activity at a time
Sustained attention
Maintain focus on selected stimulus over prolonged period; called vigilance
Executive attention
Focus on action planning, goals, errors and compensation, monitoring, and unknown
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Attention
• Infancy– Sustained (focused) attention linked to
• Habituation: decreased responsiveness to stimulus after repeated presentations
• Dishabituation: recovery of a habituated response after change in stimulation
– Joint attention begins about 7 to 8 months of age– Gaze following: begins 10 to 11 months of age
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Attention
• Infancy– Joint attention
• Individuals focus on same object or event and requires– Ability to track another’s behavior– One person directing another’s attention– Reciprocal interaction
• Frequency of caregiver-infant interactions affect language development and vocabulary size
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Attention
• Childhood– Attention control ability increases with age– Preschool child: deficits in attention control
• Attention to salient stimuli• Planning improves as part of playfulness
– Young children: most advances in executive and sustained attention
• Affected by early experiences and education
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The Planfulness of Attention
In three pairs of houses, the windows were different
In three pairs of houses, all windows were identical
J
(b)(a)
J
By filming the reflection in children’s eyes, one could determine what they looked at, how long they looked, and the sequence of their eye movements.
Fig. 7.4
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Attention
• Adolescence– Processing of irrelevant information decreases– Ability to shift from one activity to another at will
• Better at tasks that require this skill
– Better at multi-tasking• Number of competing tasks increases with age• Expands information attended to; distracting• Processing ability varies among adolescents
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Attention
• Adulthood– Older adults may not be able to focus on relevant
information as effectively as younger adults– Less adept at selective attention– Older adults (50-80) performed worse in the
divided attention condition than two younger groups; affected by vision and environmental distractions
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Memory
• Memory: retention of information over time– Allows humans to span time in reflection over life’s
activities
• Processes of memory– How information is encoded, retained, and stored
in memory– Memory has imperfections
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Processing Information in Memory
Fig. 7.5
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Memory
• Constructing memory– Schema theory
• Many reasons for inaccuracy; “we fill in gaps”• People construct and reconstruct memories; mold to fit
information already existing in mind
– Schemas• Mental frameworks that organize concepts and
information; affects encoding and retrieval
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Memory
• Culture, gender, and memory linked– Culture selectively sensitizes members of society
• Cultural specificity hypothesis– Cultural environment affects experiences
• Females better than males at– Episodic and emotion-linked memories– Processing information in elaborately and in more
detail
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Memory
• Infancy– Recent research: limited type of memory at 3 mos.– First memories
• Rovee-Collier infant memory experiments
– Implicit memory: memory without conscious recollection; skills and routine done automatically
– Explicit memory: conscious memory of facts and experiences; appears after 6 months
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Memory
• Infancy– Infantile Amnesia
• Also called childhood amnesia• One cause: immature prefrontal lobe• Adults recall little or none of first three years• Prefrontal lobes in brain play important role in memory of
events
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Memory
• Childhood– Memory improves considerably after infancy– Short-term memory
• Retains information up to 15 to 30 seconds without rehearsal (span is very limited)
– Working memory• Kind of mental workbench for manipulating and
assembling information• More active, powerful than short-term memory
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Memory
• Childhood– Working memory
• Make decisions, solve problems• Comprehend written and spoken language
– Long-term memory• Relatively permanent, unlimited type of memory• Questions about child’s ability to testify in court
– Several factors affect this ability
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Working Memory Model
Fig. 7.9
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Memory
• Children’s long-term memory – Children as eyewitnesses
• Age differences in susceptibility• Individual differences in susceptibility• Interviewing techniques can cause distortions;
determines if child’s testimony is accurate
– Depends on number of factors involved• Reliability influenced most by interviewer
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Memory
• Children’s long-term memory – Strategies used to improve
• Rehearsal: repetition better for short-term• Organizing: making information relevant
– Imagery• Creating mental images for verbal information
– Elaboration• Engaging in more extensive processing of information;
use of examples, self-referencing
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Memory
• Children’s long-term memory – Fuzzy trace theory
• Two types of memory representations– Verbatim memory trace: precise details– Gist: central idea of information
– Knowledge• Influences what people notice and how they organize,
represent, interpret information
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28Fig. 7.11
Imagery and Memory of
Verbal Information
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Memory
• Adulthood– Working memory and processing speed
• Linked to aging, reading and math achievement • Performance peaks at 45; declines at age 57• Decline affects both new and old information
– Long-term memory has two systems
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Memory
• Adulthood– Long-term memory has two systems
• Explicit: conscious/declarative memory– Episodic memory: retention of information about
the where and when of events» Autobiographical memory» Reminiscence bump
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Memory
• Adulthood– Long-term memory has two systems
• Explicit: conscious/declarative memory– Semantic memory: one’s knowledge about world
including field of expertise• Implicit memory: routine skills and procedures
performed automatically (unconscious memory)
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Memory
• Adulthood– Aging and explicit memory
• Younger adults have better episodic memory• Older adults remember older events better than more
recent events; take longer to retrieve semantic information
– Accuracy fades with the aging of a memory– Tip-of-the-tongue (TOT) phenomenon
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Memory for Spanish as a Function of Age Since Spanish Was Learned
Fig. 7.13
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Memory
• Adulthood– Aging and implicit memory
• Less adversely affected by aging than explicit memory
– Source memory • Ability to remember where something is learned
– Physical, emotional setting; speaker identity• Failures increase with age in adult years; relevancy of
information affects ability
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Memory
• Adulthood– Prospective memory
• Remembering to do something in the future• Age-related; declines depend on task• Time-based tasks decline more• Event-based tasks show less decline
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Thinking
• What is thinking?– Manipulating, transforming information in memory
• Childhood – Key aspects of infant cognitive development
• Attention, memory, imitation, concepts– Concepts:
» ideas about what categories represent– Categories:
» Grouping based on characteristics
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Thinking
• Childhood – Concepts
• Perceptual categorization: as young as 7 mos.• Categorization increases in second year; infants
differentiate more– Large gender differences based on interests
• Infant’s abilities much richer, more gradual, less stage-like, occurs earlier than Piaget thought
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Thinking
• Critical thinking– Grasping deeper meaning of ideas; open minded
• Ask what, how, and why • Examine facts and determine evidence• Recognize one or more explanations exist• Evaluate before accepting as truth• Speculate beyond what is known
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Thinking
• Scientific thinking– Aspects of thinking are domain specific (e.g. math)– Aimed at identifying causal relationships– ChiIdren: emphasize causal mechanisms
• Important differences in reasoning• Cling to old theories regardless of evidence• More influenced by happenstance• Have difficulty designing experiments
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Thinking
• Solving problems– Involves finding appropriate way to attain a goal– Children: need skill in and out of school)
• Teach strategies and rules to solve problems• Teacher is model, motivate children• Use effective strategy instruction• Encourage alternative strategies/approaches
– Use analogies to solve problems
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Thinking
• Adolescence• Critical Thinking
– If fundamental skills not developed during childhood, critical-thinking skills unlikely to mature in adolescence
• Decision Making– Older adolescents appear more competent– Ability does not guarantee every day usage– Social context plays key role here
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Thinking
• Adulthood– Practical problem solving, expertise improve
• Expertise: extensive, highly organized knowledge and understanding of particular domain
– Rely on accumulative experience– Process and analyze data automatically– Have better strategies and shortcuts
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Thinking
• Adulthood– Education, work, and health
• Influence older adult cognitive functioning• Higher educational levels today than in past• Work — now more cognitively oriented• Health: better medicine, longer life spans
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Thinking
• Cognitive neuroscience and aging– Studies brain and cognitive functioning links
• Relies on fMRI and PET scans
– Changes in brain have affects• Decline of neural circuits in prefrontal cortex• Decline in hippocampus functioning• Neural differences in age larger for retrieval than
encoding
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Thinking
• Older adulthood– Use It or Lose It:
• Practice helps cognitive skills - mindfulness• Exercise, mental health linked to cognitive fitness
– Cognitive training• Training can improve some cognitive skills• Some loss of plasticity in late adulthood
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Metacognition
• Metacognition– Takes many forms– Knowledge about when and where to use
particular strategies– Metamemory: knowledge about memory– Theory of mind: curiosity or thoughts about how
mental processes work• Changes as child ages
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Metacognition
• Developmental changes– Ages 2 to 3: awareness of emotions, perceptions,
and desires– Age 5: learn realization of false beliefs– Age 7: deepening appreciation of the mind itself– Middle and late childhood: mind seen as active
constructor of knowledge– Adolescence: realize ambivalent feelings exist
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Developmental Changes in False Belief Performance
Fig. 7.17
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Metacognition
• Individual differences– Evidenced as children reach certain milestones in
their theory of mind• Executive function: several functions important for
flexible, future-oriented behavior
– Theory of mind and autism• Difficulty in social interactions, communication, repetitive
behaviors, interests• Have difficulty developing theory of mind
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Metacognition
• Metamemory– Limited in children– Preschoolers have inflated opinion of memories,
little appreciation for memory cue importance– Understanding of memory abilities and skill in
evaluating performance on memory tasks improves considerably by 11-12 years of age
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Metacognition
• Metacognition in adolescence and adulthood– Adolescents more likely than children to effectively
manage and monitor thinking– Middle age adults have accumulated a great deal
of metacognitive knowledge– Older adults tend to overestimate memory
problems they experience on daily basis
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The End