Chapter 5
Cognitive Development
in Infancy
Chapter Outline
I.
Piaget's (1896 - 1980) Approach to Cognitive Development
A. Knowledge is the product of
direct motor behavior in infants.
B. All children pass through a
series of universal stages in a fixed order.
1. sensorimotor
2. preoperational
3. concrete operations
4. formal operations
C. Both content and quality
of knowledge increase.
D. Focus is on change in
understanding that occurs as a child moves through stages.
E. Movement through stages
occurs with physical maturation and experience with environment.
F. Piaget believed that infants
have mental structures called SCHEMES,
organized patterns of sensorimotor
functioning.
G. Two principles underlie the
growth in children's schemes:
1. ASSIMILATION is when people understand an
experience in terms of their current stage of cognitive development and way of
thinking.
2. ACCOMMODATION is change in existing ways of
thinking that occur in response to encounters with new stimuli or events.
H. The SENSORIMOTOR STAGE OF COGNITIVE DEVELOPMENT (birth until age 2), Piaget’s initial major stage of
cognitive development, can be broken down into six substages.
1. Substage 1: simple reflexes
a) first month
b) various reflexes determine the
infant's interaction with world.
2. Substage 2: first habits and primary circular reactions
a) A CIRCULAR REACTION is an
activity that permits the construction of cognitive schemes through repetition
of a chance motor event.
b) 1 - 4 months
c) coordination of actions
d) primary circular
reactions
are the infant’s repeating of interesting or enjoyable actions on his or her own body.
3. Substage 3: secondary circular reactions
a) 4 - 8 months
b) begins to act on world
(e.g., rattles rattle)
c) secondary circular
reactions
are repeated actions meant to bring about a desirable consequence on the
outside world.
d) vocalization increases and imitation
begins.
4. Substage 4: coordination of secondary circular reactions
a) 8 - 12 months
b) employ GOAL-DIRECTED BEHAVIOR, where
several schemes are combined and coordinated to generate a single act to solve
a problem.
c) development of OBJECT PERMANENCE, the
realization that people and objects exist even when they cannot be seen.
5. Substage 5: tertiary circular reactions
a) 12 - 18 months
b) tertiary circular
reactions
are the deliberate variation of actions to bring desirable consequences.
6. Substage 6: beginning of thought
a) 18 - 24 months
b) capacity for MENTAL REPRESENTATION, an internal image of a past event or object.
(1) permits child to understand
causality
(2) child gains ability to pretend
and DEFERRED IMITATION, in which a person who is no longer present
is imitated by children who have witnessed a similar act.
I.
Appraising Piaget: Support and
Challenges
1.
Most developmentalists agree that Piaget's
descriptions of how cognitive development proceeds during infancy are accurate.
a) Piaget was a master observer.
b)
Studies show that children do learn about the world by acting on
objects in their environment.
2. However, specific aspects of
Piaget's theory have been criticized.
a)
Some developmentalists question the stage
concept, thinking development is more continuous.
b)
Piaget's notion that development is grounded in motor activity ignores
the importance of infant's sensory and perceptual abilities.
c)
Recent work shows object permanence may occur as early as 3 1/2 months.
d)
Imitation may occur earlier than Piaget suggested.
e) Some development is universal, and some appears to be subject to cultural variations.
II.
INFORMATION-PROCESSING
APPROACHES seek
to identify the way that individuals take in, use, and store information.
A. Encoding, Storage, and
Retrieval: The Foundations of
Information Processing
1. Encoding is the process by which information is initially recorded in a form
usable to memory.
2. Storage refers to the maintenance of material saved in memory.
3. Retrieval is the process by which material in memory storage is located, brought
into awareness, and used.
4. Automatization is the degree to which an activity requires attention.
a)
Processes that require little attention are automatic.
b)
Processes that require large amounts of attention are controlled.
c) Automatization processes help children in their initial encounters with the world by “automatically” priming them to process information in particular ways.
B. MEMORY
is the process by which information is
initially recorded, stored, and retrieved.
1. The ability to habituate
implies some memory.
2. Infant's memories improve
with age.
3. Research suggests that
memory during infancy is dependent upon the hippocampus and that at a later age
involves additional structures of the brain.
4. Research supports the notion
of INFANTILE AMNESIA, the lack of memory for experiences that
occurred prior to three years of age.
a) Although memories are stored
from early infancy, they cannot be easily retrieved.
b) Early memories are
susceptible to interference from later events.
c) Memories are sensitive to
environmental context.
C. Individual Differences in
Intelligence: Is One Infant Smarter Than
Another?
1. Infant intelligence, like
adult intelligence, is difficult to define.
2. Arnold Gesell
formulated the DEVELOPMENTAL QUOTIENT,
an overall developmental score that
relates to performance in four domains:
motor skills, language use, adaptive behavior, and personal-social.
a) He compared babies’ performance at different ages to learn what behaviors were most common at a particular age.
3. BAYLEY SCALES OF INFANT DEVELOPMENT are a measure that
evaluates an infant's development from 2 to 30 months.
a) Mental Scale
(1) senses
(2) perception
(3) memory
(4) learning
(5) problem solving
(6) language
b) Motor Scale
(1) gross motor skills
(2) fine motor skills
c) Like Gesell, Bayley’s yields a developmental quotient (DQ).
4. These normative scales are
useful in identifying infants who are significantly behind their peers but are
not good at predicting future behavior.
5. Contemporary approaches to
infant intelligence measure how quickly infants process information.
a) VISUAL-RECOGNITION MEMORY is a measure
of memory and recognition of a stimulus that has been previously seen.
b) CROSS-MODAL TRANSFERENCE is the
ability to identify a stimulus that has previously only been experienced
through one sense using another sense.
c) These measures correlate
moderately well with later measures of intelligence.
6. Assessing
Information-Processing Approaches
a)
Rather than focusing on broad explanations of the qualitative
changes that occur, as Piaget’s does, information processing looks at quantitative
change.
b)
Information processing approaches see cognitive growth as more gradual,
step-by-step.
c) Information processing approaches are often able to use precise measures of cognitive ability.
III.
The Roots of Language
A. LANGUAGE is the systematic, meaningful
arrangement of symbols, and provides the basis for communication.
B. Language has several formal
characteristics that must be mastered as linguistic competence is developed.
1. Phonology refers to the basic sounds of language, called phonemes, that can be combined to
produce words and sentences.
2. Morphemes are the smallest language unit that has meaning.
3. Semantics are the rules that govern the meaning of words and sentences.
C. Language is closely tied to
the way infants think and how they understand the world.
1. Linguistic comprehension is the understanding of
speech.
2. Linguistic production is the use of language to
communicate.
3. Comprehension precedes
production.
4. Infants show PRELINGUISTIC COMMUNICATION through sounds, facial expressions,
gestures, imitations, and other non-linguistic means.
a) BABBLING is when infants make speechlike but meaningless sounds at about 2 - 3 months
continuing to about 1 year.
b) Babbling is a universal
phenomenon.
c) Babbling begins with easy
sounds (b - p) and proceeds to more complex sounds (d - t).
d) By age 6 months, babbling
differs according to the language to which the infant is exposed.
5. First words are generally
spoken between 10 and 14 months.
a) First words are typically HOLOPHRASES, one-word utterances that depend on the particular context in which they
are used to determine meaning.
b) By 15 months the average
child has a vocabulary of 15 words.
c) Between 16 and 24 months a
child's vocabulary increases to 100 words.
6. by 18 months, infants are linking words in sentences using TELEGRAPHIC SPEECH where words not critical to the message are left out.
a) UNDEREXTENSION, using words too restrictively,
is common.
b) OVEREXTENSION, using words too broadly, is
also common.
c) Some
infants use a REFERENTIAL STYLE of
language use in which language is used primarily to label objects.
d) Others
use an EXPRESSIVE STYLE, of
language use in which language is used primarily to express feelings and needs
about oneself and others.
D. The origins of language
development
1. LEARNING THEORY APPROACH posits that
language acquisition follows the basic laws of reinforcement and conditioning.
a) Through the process of shaping, language becomes more and more
similar to adult speech.
b) This theory does not explain
how children learn grammar.
c) It does not explain how
children produce novel phrases, sentences, and constructions, such as nonsense
words using correct grammar.
2. An alternative theory is the
NATIVIST APPROACH, which proposes that a genetically determined,
innate mechanism directs language development.
a) Proposed by Noam Chomsky.
b) Chomsky argues that all the world’s languages share a similar
underlying structure called UNIVERSAL GRAMMAR.
c) The brain is wired with a LANGUAGE-ACQUISITION DEVICE (LAD), a
neural system of the brain hypothesized to permit the understanding of
language.
d)
Critics argue that since primates can be taught to talk, the uniqueness
of human linguistic capacity is called into question.
e)
Other critics suggest that we must identify mechanisms other than the
LAD or learning theory principles to fully understand language development.
3.
An alternative approach combines both schools of thought, the interactionist perspective, which suggests
that language development is produced through a combination of genetically
determined predispositions and environmental events.
E. Speaking to Children: The Language of Infant-Directed Speech
1.
INFANT-DIRECTED SPEECH, a type of speech directed
towards infants, characterized by short, simple sentences.
a) This type was previously
called motherese.
(1) Pitch of voice becomes
higher.
(2) Intonation may be singsong.
(3) Typically only used during
first year.
b) Infants seem more receptive
to this type of speech.
c) Use of this type of speech
is related to the early appearance of words.
2. Research shows that parents
use different language for boys than for girls.
a)
They use diminutives more with girls, warmer phrases and more emotional
referents and tend to make refusals less direct.
b) Boys tend to hear firmer,
clearer language.
Key Terms and Concepts
Scheme
Assimilation
Accommodation
Sensorimotor stage (of cognitive
development)
Circular reaction
Goal-directed behavior
Object permanence
Mental representation
Deferred imitation
Information-processing approaches
Memory
Infantile amnesia
Developmental quotient
Bayley scales of Infant
Development
Visual-recognition memory
Cross-modal transference
Language
Prelinguistic communication
Babbling
Holophrases
Telegraphic speech
Underextension
Overextension
Referential style
Expressive style
Learning theory approach
Nativist approach
Universal grammar
Language-acquisition device (LAD)
Infant-directed speech