Developmental psychology examines psychological changes across the entire lifespan. It considers biological, social, cognitive, and personality development from conception through late adulthood. Key issues include the interplay between nature and nurture, whether development is continuous or stage-based, and how physical and psychological development influence each other prenatally and through childhood. Early development includes language acquisition, attachment to caregivers, gender role learning, and cognitive stages described by theorists like Piaget. Adolescence involves identity development and increased peer influence. Adulthood brings continued development through social roles, while late adulthood focuses on activity level and preparation for death.
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Milestones are very often referred to as red flags. this chapter differentiates between the growth and development, deals with the body types and the factors of evelopment. The stages of development from infancy to middle childhood are dealt with in this chapgter. It also deals with the aspects of development
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2. Developmental
Psychology
• What shapes the way we change over time?
• Focus on psychological changes across the
entire life span
• Every area of psychology can be looked at
from this perspective
– biological development
– social development
– cognitive/perceptual development
– personality development
3. Fundamental Issues:
Nature vs. Nurture
• What is role of heredity vs. environment in
determining psychological makeup?
– Is IQ inherited or determined early environment?
– Is there a ‘criminal’ gene?
– Is sexual orientation a choice or genetically
determined?
• These are some of our greatest societal
debates
• Mistake to pose as “either/or” questions
4. Fundamental Issues:
Is Development Continuous?
• Development means change; change can
be abrupt or gradual
• Two views of human development
– stage theories: there are distinct phases
to intellectual and personality development
– continuity: development is continuous
5. Dominant and Recessive
Genes
• Genotype—underlying genetic makeup
• Phenotype—traits that are
expressed
• Dominant genes—will always be
expressed if present
• Recessive genes—will not be
expressed unless they are in a pair
6. Sex Linked Traits
• Traits linked to the X or Y (sex)
chromosomes
• Usually recessive and carried on the
X chromosome
• Appear more frequently in one sex
than another
• Color blindness, baldness, hemophilia,
Fragile X
7. Physical and Psychological
Development Related
• Physical development begins at
conception
• Physical maturity sets limits on
psychological ability
– visual system not fully functional at birth
– language system not functional until much later
• Prenatal environment can have lifetime
influence on health and intellectual
ability
8. Prenatal Development
• Conception—when a sperm penetrates the
ovum
• Zygote—a fertilized egg
• Germinal period—first two weeks after
conception
• Embryonic period—weeks three through
eight after conception
• Fetal period—two months after conception
until birth
16. Prenatal Influences
on Development
• Nutrition
• Anxiety
• Mother’s general health
• Maternal age
• Teratogens—any agent that causes
a birth defect (e.g., drugs,
radiation, viruses)
• Disease
18. Infant Abilities
• Infants are born with immature visual
system
– can detect movement and large objects
• Other senses function well on day 1
– will orient to sounds
– turn away from unpleasant odors
– prefer sweet to sour tastes
• Born with a number of reflex behaviors
19. Infant Reflexes
• Rooting—turning the head and
opening the mouth in the direction
of a touch on the cheek
• Sucking—sucking rhythmically in
response to oral stimulation
• Grasping—curling the fingers
around an object
20. Social and Personality
Development
• Temperament--inborn
predisposition to consistently
behave and react in a certain
way
• Attachment-- emotional bond
between infant and caregiver
21. Temperament
Chess S., Thomas, A. (1987)
• Easy—adaptable, positive mood, regular
habits
• Slow to warm up—low activity, somewhat
slow to adapt, generally withdraw from new
situations
• Difficult—intense emotions, irritable, cry
frequently
• Average—unable to classify (1/3 of all
children)
• Goodness of fit
22. Quality of Attachment
• Parents who are consistently warm,
responsive, and sensitive to the
infant’s needs usually have infants
who are securely attached
• Parents who are neglectful,
inconsistent, or insensitive to infant’s
needs usually have infants who are
insecurely attached
23. Harlow’s Monkeys
• Social Isolation leads
to serious problems
• Normal development
requires affectionate
contact
• Lack of social
contact, rather than
lack of parent causes
the problem
• Lesser periods of
isolation may be
overcome, longer
periods cause
irreparable damage
24. Ainsworth’s
Strange Situation
• Used to study quality of attachment in
infants
• Observe child’s reaction when mother is
present with the child in a “strange” room
• Observe the child’s reaction when mother
leaves
• Observes the child’s reaction when mother
returns
25. Language Development
• Noam Chomsky asserts that every
child is born with a biological
predisposition to learn language
“universal grammar”
• Motherese or infant directed
speech--style of speech used by
adults (mostly parents) in all cultures
to talk to babies and children
26. Language Development
• Infant preference for human speech over
other sounds
– before 6 months can hear differences used in all languages
– after 6 months begin to hear only differences used in native
language
• Cooing—vowel sounds produced 2–4 months
• Babbling—consonant/vowel sounds between
4 to 6 months
• Even deaf infants coo and babble
27. Language Development
MONTH Speech Characteristic
2 Cooing vowel sounds
4 Babbling consonant/vowel
10 Babbling native language sounds
12 One-word stage
24 Two-word stage
24+ Sentences
28. Young Children’s
Vocabulary
• Comprehension vocabulary--
words that the infant or child
understands
• Production vocabulary--words
that the infant or child
understands and can speak
29. Gender Role Development
• Gender—cultural, social, and psychological
meanings associated with masculinity or
femininity
• Gender roles—various traits designated either
masculine or feminine in a given culture
• Gender identity—A person’s psychological sense
of being male or female
• Between ages 2-3 years, children can identify
themselves and other children as boys or girls.
The concept of gender or sex, is, however, based
more on outward characteristics such as
clothing.
30. Gender Differences
• Toddler girls tend to play more with dolls
and ask for help more than boys
• Toddler boys tend to play more with trucks
and wagons, and to play more actively
• After age 3 years we see consistent
gender differences in preferred toys and
activities
• Children are more rigid in sex-role
stereotypes than adults
31. Social Learning Theory
Gender roles are acquired through the basic
processes of learning, including
reinforcement, punishment, and modeling
32. Gender Schema Theory
•Gender-role development is influenced by the
formation of schemas, or mental
representations, of masculinity and femininity
•Children actively develop mental categories of
masculinity ad femininity and categorize these
into gender categories or schemas
•Trucks are for boys and dolls are for girls is an
example of a gender schema
33. Piaget’s Theory of
Cognitive Development
• Jean Piaget (1896–1980) Swiss
psychologist who became leading theorist
in 1930s
• Piaget believed that “children are active
thinkers, constantly trying to construct
more advanced understandings of the
world”
• Cognitive development is a stage process
34. Piaget’s Approach
• Primary method was to ask children to
solve problems and to question them
about the reasoning behind their
solutions
• Discovered that children think in
radically different ways than adults
• Proposed that development occurs as a
series of ‘stages’ differing in how the
world is understood
35. Sensorimotor Stage
(birth – 2)
• Information is gained through the
senses and motor actions
• Child perceives and manipulates but
does not reason
• Symbols become internalized
through language development
• Object permanence is acquired
36. Object Permanence
• The understanding that objects exist
independent of one’s actions or
perceptions of them
• Before 6 months infants act as if
objects removed from sight cease to
exist
– Can be surprised by disappearance/reappearance
of a face (peek-a-boo)
37. Piaget
Preoperational Stage
(2–7 years)
• Emergence of symbolic thought
• Egocentrism
• Lack of the concept of conservation
• Animism
Concrete Operational
(7–12 years)
• Increasingly logical thought
• Classification and categorization
• Less egocentric
• Conservation
• No abstract or hypothetical reason
Formal Operational Stage
(age 12 – adulthood)
• Hypothetico-deductive reasoning
• Emerges gradually
• Continues to develop into adulthood
38. Critique of Piaget’s
Theory
• Underestimates children’s abilities
• Overestimates age differences in
thinking
• Vagueness about the process of change
• Underestimates the role of the social
environment
• Lack of evidence for qualitatively
different stages
39. Information-Processing
Perspective
• Focuses on the mind as a system,
analogous to a computer, for analyzing
information from the environment
• Developmental improvements reflect
– increased capacity of working memory
– faster speed of processing
– new algorithms (methods)
– more stored knowledge
40. Vygotsky’s
Sociocultural Perspective
• Emphasized the child’s interaction with
the social world (other people) as a
cause of development
• Vygotsky believed language to be the
foundation for social interaction and
thought
• Piaget believed language was a
byproduct of thought
41. Identity Development
• Identity vs. role confusion is the
psychosocial stage during adolescence
• Developing a sense of who one is and where
one is going in life
• Successful resolution leads to positive
identity
• Unsuccessful resolution leads to identity
confusion or a negative identity
42. Erikson’s Theory
Stage Age Psychosexual
Psychosocial
Crisis
Virtue Danger
Infancy to age 2 Oral/ Sensory
Trust vs.
Mistrust
Hope Withdrawal
Early 2-3 Muscular/ Anal
Autonomy vs.
Shame
Will Compulsion/
Play Age 3-5 Locomotor/
Initiative vs.
Guilt
Purpose Inhibition
School Age 6-12 Latency
Industry vs.
Inferiority
Competence Inertia
Adolescence 12-18 Puberty
Identity vs.
Identity
Confusion
Fidelity Role Repudiation
Young 19-35
Intimacy vs.
Isolation
Love Exclusivity
Adulthood 35-65
Generativity
vs.Stagnati
on
Care Rejectivity
Old Age after 65
Integrity vs.
Despair
Wisdom Disdain
43. Kohlberg’s Theory of
Moral Development
• Assessed moral reasoning by posing
hypothetical moral dilemmas and
examining the reasoning behind
people’s answers
• Proposed six stages, each taking
into account a broader portion of
the social world
44. Levels of Moral
Reasoning
• Preconventional—moral reasoning is
based on external rewards and
punishments
• Conventional—laws and rules are upheld
simply because they are laws and rules
• Postconventional—reasoning based on
personal moral standards
46. Adolescence
• Transition stage between late childhood
and early adulthood
• Sexual maturity is attained at this time
• Puberty--attainment of sexual maturity
and ability to reproduce
• Health, nutrition, genetics play a role in
onset and progression of puberty
47. Social Relationships
• Parent-child relationship is usually
positive
• May have some periods of friction
• Peers become increasingly important
• Peer influence may not be as bad as
most people think. Adolescents tend to
have friends of similar age, race, social
class, and with same religious beliefs.
48. Baumrind’s
Parenting Styles
• Authoritarian—value obedience and
use a high degree of power assertion
• Authoritative—less concerned with
obedience, greater use of induction
• Permissive—most tolerant, least likely
to use discipline
• Neglectful—completely uninvolved
49. Adult Development
• Genetics and lifestyle combine to
determine course of physical changes
• Social development involves marriage
and transition to parenthood
• Paths of adult social development are
varied and include diversity of
lifestyles
50. Late Adulthood
• Old age as a time of poor health,
inactivity, and decline is a myth
• Activity theory of aging—life
satisfaction is highest when people
maintain level of activity they had in
earlier years
51. Death and Dying
• In general, anxiety about dying tends to
decrease in late adulthood
• Kubler-Ross stages of dying
– Denial
– Anger
– Bargain
– Depression
– Acceptance
• Not universally demonstrated