Chapter 10 - Human Development Flashcards
Developmental Psychology
study of how behaviour and mental processes change over the lifespan
Post Hoc Fallacy
false assumption that because one event occurred before another event, it must have caused the event
What does it mean to say development is “bidirectional”?
experiences influence development but development also influences experiences
Environmental Factors (nurture)
the things surrounding an individual that alter their trajectory (ie. nutrition, resources, opportunities)
Genetic Factors (nature)
predetermined factors that alter life trajectory (ie. height, hair colour, disease)
Unidirectional Explanations
those that attempt to explain development from a one-headed arrow (→ vs. ⇆)
Cross-Sectional Design
research design that examines people of different ages at a single point in time
What do cross-sectional designs not control for?
the cohort effect
Cohort Effects
effect observed in a sample of participants that results from individuals in the sample growing up at the same time
Longitudinal Design
research design that examines development in the same group of people on multiple occasions over time
Longitudinal design solves the _______ effect problem
cohort
Externalizing Behaviours
breaking rules, defying authority figures, committing crimes
Attrition
participants drop out of the study before it is completed
________ is a problem of longitudinal designs
attrition
Why can’t we use longitudinal designs to infer cause-and-effect relationships?
they aren’t experimental designs
Life experiences influences brain and behaviour throughout the _______
lifespan
What are the two myths of development?
1.infant determinism
2. childhood fragility
Infant Determinism
the widespread assumption that early experiences are more influential than later experiences
Childhood Fragility
holds that children are delicate little creatures that are easily damaged
Gene-Environment Interactions
the impact of genes on behaviour depends on the environment in which the behaviour develops
Nature via Nurture
genetic predispositions can drive us to select and create particular environments, leading to a mistaken appearance of purely natural effects
Gene Expression
some genes only “turn on” in response to specific environmental events
Monoamine Oxidase (MAO)
an enzyme which in low production may heighten the risk for violent criminal behaviour
Prenatal
prior to birth
When does the human body acquire basic form and structure?
prenatal period
When do the most dramatic prenatal changes occur?
in the earliest stages of development
Zygote
fertilized egg
Germinal Stage
zygote begins to divide and double forming a blastocyst
Blastocyst
ball of identical cells early in pregnancy that haven’t yet begun to take on any specific function in a body part
When do cells begin to differentiate?
middle of the second week
What does the blastocyst become after cellular differentiation?
embryo
Embryo
second to eighth week of prenatal development, during which limbs, facial features, and major organs take form
What stage of fetal development does the heart begin to beat?
9th week
Fetal stage is the point where the embryo becomes a _______
fetus
Fetus
period of prenatal development from ninth week until birth after all major organs are established and physical maturation is the primary change
The final 1/3 of pregnancy is all about “_________ up”
bulking
The human brain begins to develop ___ days after fertilization
18
Most organs are completely formed by birth, except for the ____
brain
Proliferation
period between 18th day and 6th month where neurons develop at an astronomical rate
When do neurons start to sort themselves out and move to their final position in the brain?
starting at 4 months
What are 3 ways fetal development can be disrupted?
- exposure to hazardous environmental influences
- biological influences resulting from genetic disorders or errors during cell division
- premature birth
Most females don’t realize they are pregnant until after…
fetal body and brain development have started
Teratogen
an environmental factor that can exert a negative impact on prenatal development
Examples of teratogens…
drugs, alcohol, chicken pox, x-rays
Fetal Alcohol Spectrum Disorder
condition resulting from high levels of prenatal alcohol exposure, causing learning disabilities, delays in physical growth, facial malformations, behavioural disorders
__ of every 1000 births in Canada are diagnosed with FASD
9
Mothers who smoke or use recreational drugs are more likely to deliver ___________ babies
low birth weight
Low birth weight = less than ___ lbs
5.5
Average birth weight = ____ lbs
7.5
Low birth weight poses risk for…
death, infection, developmental disorders
Genetic disorders
random errors in cell divison
Full term baby = __ weeks or ___ months
40 weeks or 9.5 months
Premature babies are born earlier than __ weeks
36
Viability Point
point where infants can usually survive on their own
What is the viability point?
25 weeks
Reflexes
automatic motor behaviours infants are born with
Sucking Reflex
automatic response to oral stimulation
Motor Behaviours
bodily motion that occurs as a result of self-irritated force that moves bones and muscles
Sitting without support __ months
6
Crawling __ months
9
Standing __ months
11
Cruising __ months
12
Walking without assistance __ months
13
Running ___ to ___ months
18-24
Mini growth spurts occur every 30 to __ days from ages 3 to 16
55
Adolescence
the transition between childhood and adulthood commonly associated with the teenage yearss
Testosterone in Males
muscle tissue increase, growth of facial and body hair, broadening of shoulders
Estrogen in Females
breast growth, uterine and vaginal maturation, hip broadening, onset of menstruation
What change results in greater strength and endurance in males?
changes in lung function and circulation
Puberty
achievement of sexual maturation resulting in the potential to reproduce
Primary Sex Characteristics
physical feature such as the reproductive organs and genitals
Secondary Sex Characteristics
a sex-differentiating characteristic that doesn’t relate directly to reproduction, such as breast enlargement and deepening of voices