What is developmental psychology?
• Study of how behavior changes over the lifespan
What is post hoc fallacy?
What is cross-sectional design?
What is the cohort effect?
What is a longitudinal design?
Describe the influence of early experiences on children
* Influences in infancy are rarely reversible
What is infant determinism and what is the truth behind this myth?
• Myth
o Assumption extremely early experiences (<3 yrs) are more influential than later experience
• Truth
o Early experiences affect physical, cognitive, and social development
o Later experiences often off set early negative experiences/deprivation
o Brain continues to change in response to experiences throughout childhood
What is childhood fragility and what is the truth behind this myth?
• Myth
o Children are delicate and easily damaged
• Truth
o Children are resilient
o Extremely negative effects can have long lasting effects, but they recover amazingly well
What are the effects on genes in terms of childhood development?
Gene – Environment Interaction
• Effects of genes depend on the environment in which they are expressed
Nature via Nurture
• Tendency of individuals with certain genetic predispositions to seek out and create environments that permit the expression of these predispositions
Gene Expression
• Activation or deactivation of genes by environmental experiences throughout development
What are the 3 stages of prenatal development?
Germinal Stage
• Blastocyst – ball of undifferentiated cells
Embryonic Stage
• Embryo develop about week 2 when cells begin to differentiate
Fetal Stage
• Begins at week 9 as heart begins to beat
Describe basic brain development
What are teratogens?
Why are infant reflexes important?
• Fulfill important survival needs
What are coordinating movements?
• Trial and error that leads to coordinated movements
• Motor behaviours
o Bodily motion that occurs as a result of self initiated force that moves the bones and muscles
• Milestones include sitting, standing, walking, etc.
o Timeline may vary, order usually doesn’t
• Physical maturation and cultural parenting practices effect when milestones are achieved
Describe physical maturation in adolescence
What changes occur during puberty?
• Primary sex characteristics o Reproductive organs and genitals • Secondary sex characteristics o Sex differentiating characteristics not directly related to reproduction • Menarche o Onset of maturation o Tends to be after physical maturity reached • Spermarche o First ejaculation o Not tied to physical maturation
Describe physical development in adults
• Physical peak in early 20s
• Middle adulthood sees decrease in muscle, increase in body fat, and decrease in sensory processes
• Fertility decreases and birth defects increase in women in 30s and 40s
• Menopause
o End of menstruation and reproductive years in women
• Men see decrease in sperm and testosterone, increase in ED, and increase in children with developmental disorders
• Strength training and increased physical activity can counteract declines with age
What is cognitive development?
• Study of how children acquire the ability to learn, think, reason, communicate, and remember
What are the basics of Piaget’s cognitive development theory?
• Children’s understanding of world is different than adults
o Rational thoughts based on limited experiences
• Children actively seek information and observe consequences
• Stage like and domain general
o Radical reorganizations followed by plateaus
o Change marked by equilibration
Balance between our experiences and our thoughts about it
• Children check new info against current schemes and adjust when needed
What are assimilation and accommodation as described by Piaget?
Assimilation
• Process of absorbing new experiences into current knowledge structures
• Cognitive skills and world views remain unchanged
• Reinterprets info into what she already knows
Accommodation
• Alteration of a belief to make it more compatible with experience
• Drives the stage change
What are the 4 stages of development as per Piaget?
Stage 1 – Sensory Motor Stage
Stage 2 – Preoperation Stage
Stage 3 – Concrete Operations Stage
Stage 4 – Formal Operations Stage
What is the first stage of development according to Piaget?
Stage 1 – Sensory Motor Stage
• About 0-2 years
• New info based on physical experiences
• Lack object permanence
o Understanding that objects continue to exist even when out of view
• Lack deferred imitation
o Ability to perform an action observed earlier
• Milestone for stage change
o Mental representation
o Ability to think about something absent from immediate area
What is the second stage of development according to Piaget?
Stage 2 – Preoperation Stage
• About 2-7 years
• Ability to use representations of experience
o Example language, drawing, playing house etc.
• Hampered by egocentrism
o Inability to see the world from others perspectives
• Inability to perform mental operations
o Cannot change the representations
• Fail conservation tasks
o They don’t understand despite a transformation in the physical presentation of an amount, the amount remains the same
What is the third stage of development according to Piaget?
Stage 3 – Concrete Operations Stage
• About 7-11 years
• Ability to perform mental operations for physical events
• Can pass conservation tasks
• Can perform organizational tasks requiring mental operations on physical objects