Midterm 2 Flashcards
Developmental Psychology
The study of how behaviour changes throughout life
Challenges when examining human development:
– Post Hoc Fallacy
– Bidirectional Influences
– Cohort Effects
Post Hoc Fallacy:
Logical error where you assume that A causes B, just because B came after A
Bidirectional Influences:
- Human development almost always includes two - way interaction
- Children’s development affect their experiences, but their experiences also affect their development
Cohort effects:
Groups of people who lived in one period may be systematically different from groups that lived in another period.
Research Strategies:
- Cross-sectional designs
- Longitudinal designs
- Sequential designs
Cross-sectional design:
- Every age group attended the same classes.
- Several groups collaborate in one task.
Disadvantages of Cross-sectional design:
– Cohort effects?
– Provides no data on the
development of individuals
because only measured at one
time point
Longitudinal design
- Throughout time, the same people were observed at least twice more.
- Time span may be short (a few days) or extremely long (several years, or even decades)
– Allow us to examine true developmental change
Disadvantages of Longitudinal design:
– Costly, time-consuming
– Not true experimental design
Sequential design
Combination of cross-sectional and longitudinal
Sequential design of Disadvantages:
– Even more costly and time consuming
– Different attrition rates across groups
The Nature-Nurture Debate
Nature via nurture - Kids with specific genetic predispositions frequently seek out and build their own environments, giving the impression that nature is the only factor at play.
Gene expression is the process through which genes are activated or deactivated as a result of environmental events during development.
Prenatal Development:
A zygote is formed when sperm cell fertilizes an egg. Zygote goes through germinal stage. In middle of the second week, blastocyst becomes an embryo. The embryonic stage lasts until 8 weeks. By the 9th week and the start of the fetal stage,
the major organs are established and heart beats.
Brain Development:
The human brain begins to develop 18 days after fertilization. Neurons are brain cells, specialized in
communication with each other. Adult brain has approximately 100 billion neurons, with 160 billion
connections between them. Unique shape compared to other cells. Most organs are completely formed at birth and continue to grow in size only. Human brain continues to develop into
adolescence and early adulthood. Between day 18 and the 6th prenatal month, neurons grow at an incredible rate (proliferation) – Up to 250,000 neurons per minute at times. Around month 4 (prenatal), brain begins to
organize
Obstacles to healthy prenatal development
Teratogens: factors that may have a negative impact on prenatal development (smoking, drugs, chicken pox)
fetal alcohol spectrum disorder (FAS)
Prematurity
motor development progress during the first 2 years of life
Infants are born with a large set of
automatic motor behaviours (reflexes) – Sucking and rooting reflexes
Motor behaviours are body movements
that comes from an inner force that moves the bones and muscles
Physical development
size of our body parts changes dramatically
Adolescence is the transitional period between childhood and adulthood. This is when our bodies reach full maturity, in part due to hormonal
release – Estrogens and androgens
Puberty is largely due to that hormonal release
3 major ways in which theories of cognitive development differ:
- Stagelike vs gradual changes in understanding
- Domain-general vs domain-specific
- Principal source of learning
Describe how children use the processes of assimilation and accommodation to acquire knowledge
Schema: organized mentalpatterns that evolve and change as the mind does
- There are two ways that intelligence develops:
Assimilation is the process through which people understand an event in perspective of their cognitive development and way of thinking at the time.
Accommodation: changes in existing thought patterns carried on by exposure to new information or events - Kid learn schema of something (cat). Goes to zoo, saw tiger and called it cat (assimilation). But then learn that it’s a tiger (accomodation). Now he/she has a new schema of tiger.
Four stages of cognitive development according to
Piaget
- Sensorimotor (birth – 2 years)
- Main source of knowledge is via physical interactions
- cognitive abilities: Object permanence: understanding that objects continue to exist even when out of view. Deferred imitation: the ability to perform an action that was observed earlier - Preoperational stage (2 - 7 years)
- Egocentrism: the young child’s belief that everyone sees and experiences the world the way she does
- Able to construct mental representations of experience - Concrete Operations (7 - 11 years)
- Can perform mental operations, but only for actual physical events - Formal operations (11+ years)
- Can understand hypothetical reasoning beyond the here and now
- Understands logical concepts and abstract
questions
– E.g., “if, than” statements: “If all people are equal,
then you and I must be equal”
– E.g., “what if?” questions
- Utilizes systematic problem solving
– the ability to methodically search for the answer
to a problem.
Pros and Cons of Piaget
Cons:
* Development is more continuous than stage-like
* Underestimated children’s competence due to task demands
* Culturally biased methods
* Limited sample (used his own children a lot)
Pros:
* Still highly influential, helped change how we think about cognitive development
* Children are not just small adults!
* Learning is an active rather than passive process
* Exploring general cognitive processes that explain multiple domains of knowledge
Lev Vygotsky
Theory focused on social and cultural influences on cognitive development
Scaffolding:
Structuring environments for learning and then gradually remove it
Zone of proximal development:
Range of tasks a person is capable
of, given appropriate assistance
Temperament:
refers to one’s basic emotional style that
appears early in development
3 Major Temperamental Styles (Thomas & Chess)
– Easy (40%)
– Difficult (10%)
– Slow-to-warm up (15%)
Imprinting:
phenomenon in which baby birds begin to follow around and attach themselves to any large moving
object they see in the hours immediately after hatching – Only happens within first 36 hours
Attachment:
Emotional connection we share with those to whom we feel closest